Baraa Al-Halabi, AFP/Getty ImagesA Syrian man cries as he sits on the rubble of a building following a reported barrel-bomb attack by Syrian government forces on Aug. 11, 2014, in the northern Syrian city of Aleppo.
George Ourfalian, AFP/Getty ImagesSyrian pro-government forces walk around the village of Minyan, west of Aleppo, after they retook the area from rebel fighters on Nov. 12, 2016.
APThis image made from video posted by Shaam News Network and taken May 29, 2013, which is consistent with other AP reporting, shows a Free Syrian Army fighter firing a rocket propelled grenade in Aleppo, Syria.
Omar Haj Kadour / AFP/Getty ImagesAmbulances carrying people who were evacuated from rebel-held neighborhoods in the embattled city of Aleppo arrive in the opposition-controlled Khan al-Aassal region, west of the embattled city, on Dec. 16, 2016.
Zac Baillie, AFP/Getty ImagesSyrian rebels run to help a wounded comrade after he was shot by a sniper during clashes with government forces in the Ezza district of the northern city of Aleppo on Sept. 8, 2012.
Karam aL-Masri / AFP/Getty ImagesA wounded boy sits inside an ambulance as Syrian rebels and their families gather at the rebel-held al-Amiriyah neighbourhood as they wait to be evacuated to the government-controlled area of Ramoussa on the southern outskirts of the city on December 15, 2016.
STR / APSyrians evacuated from the embattled Syrian city of Aleppo during the ceasefire arrive at a refugee camp in Rashidin, near Idlib, Syria, on Dec. 20, 2016. Russian Foreign Minister Sergey Lavrov said on Tuesday that Russia, Iran and Turkey are ready to act as guarantors in a peace deal between the Syrian government and the opposition. He spoke on Tuesday after a meeting of the three countries' foreign ministers in Moscow.
STRINGER / AFP/Getty ImagesSyrians are evacuated from a rebel-held area of Aleppo towards rebel-held territory in the west of Aleppo's province on December 16, 2016. Russia announced it was negotiating with the Syrian opposition and seeking a nationwide ceasefire, as the evacuation of civilians and fighters from the last rebel-held parts of Aleppo entered a second day. The Syrian Observatory for Human Rights, a Britain-based monitor of the war, estimated some 8,500 people had left so far, including around 3,000 rebel fighters. Syrian state media reported a figure of around 8,000.
Baraa Al-Halabi, AFP/Getty ImagesA Syrian man reacts after a reported airstrike by Syrian government forces in the rebel-held neighborhood of Bustan al-Qasr on June 5, 2016.
Hassan Ammar / APSyrian army soldiers fire their weapons during a battle with insurgents at the Ramouseh front line east of Aleppo, Syria, on Dec. 5, 2016.
STR / APAn injured Syrian arrives at a refugee camp in Rashidin, near Idlib, Syria, after was evacuated from the embattled Syrian city of Aleppo during the ceasefire, on Dec. 20, 2016. Russian Foreign Minister Sergey Lavrov said on Tuesday that Russia, Iran and Turkey are ready to act as guarantors in a peace deal between the Syrian government and the opposition. He spoke on Tuesday after a meeting of the three countries' foreign ministers in Moscow.
Ameer Alhalbi, AFP/Getty ImagesSyrian civil defence volunteers and rescuers remove a baby from under the rubble of a destroyed building following a reported air strike on the rebel-held neighbourhood of al-Kalasa in the northern Syrian city of Aleppo, on April 28, 2016.
George Ourfalian / AFP/Getty ImagesA general view shows Syrian pro-government forces walking in the ancient Umayyad mosque in the old city of Aleppo on December 13, 2016, after they captured the area.
Bulient Klic / AFP/Getty ImagesAn injured Syrian boy sits on a bed at a hospital on December 16, 2016, on the Syrian side of the Bab al-Hawa border crossing between Syria and Turkey. The Syrian government suspended the evacuation of the last rebel-held parts of Aleppo, but a military source denied a Russian statement that the operation was "complete."
APThis photo provided by the Aleppo Media Center, which has been authenticated based on its contents and other AP reporting, shows the 12th century Umayyad mosque and the remains of its minaret in the background right corner, after it was destroyed by shelling in Aleppo, Syria, on April 24, 2013.
Khaled Khatib, AFP/Getty ImagesAn emergency reponse member carries a wounded child following an airstrike by government forces on the northern Syrian city of Aleppo on Feb. 22, 2014.
George Ourfalian, AFP/Getty ImagesSyrian government forces hold a portrait of late Syrian president Hafez al-Assad as they drive near smoke billowing from Aleppo's thermal power plant after re-taking the area on the eastern outskirts of Syria's northern embattled city of Aleppo from Islamic State fighters on February 21, 2016.
George Ourfalian, AFP/Getty ImagesA Syrian man who was wounded following reported shelling by rebel fighters arrives at a hospital in the Al-Jamiliyah neighborhood on the government-controlled side of the divided northern Syrian city of Aleppo on June 5, 2016.
Javier Manzano, AFP/Getty ImagesTwo Syrian rebels take sniper positions at the heavily contested neighborhood of Karmal Jabl in central Aleppo on Oct. 18, 2012.
Aris Messinis, AFP/Getty ImagesFree Syria Army fighters bring a wounded comrade to a hospital in Aleppo, Syria, on Aug. 28, 2012.
APIn this photo released by the Syrian official news agency SANA, Syrian citizens and firefighters gather at the scene where a rocket hit the Dubeet hospital in Aleppo, Syria, on May 3, 2016.
George Ourfalian, AFP/Getty ImagesSmoke billows during fighting as Syrian pro-government forces walk on a street on Nov. 27, 2016, in the Masaken Hanano district in eastern Aleppo, a day after they seized it from rebel fighters.
Thaer Mohammed, AFP/Getty ImagesSyrian men carry a body following reported airstrikes in the rebel-held Shaar neighborhood in the northern city Aleppo on June 8, 2016.
Philipe Desmazes, AFP/Getty ImagesRebel fighters take position in a flat during a battle against Syrian government forces on Oct. 30, 2012, in the Salaheddin district of the northern city of Aleppo.
Louai Abo Al-Jod, AFP/Getty ImagesA rebel fighter takes aim at regime forces in the northern Syrian city of Aleppo on Sept. 1, 2013.
APA Free Syrian Army fighter fires an AK-47 during a battle against the Syrian army loyal to President Bashar Assad in Aleppo, Syria, on Nov. 8, 2013.
Fadi Al-Halabi, AFP/Getty ImagesA rebel fighter scans the area with the scope of his rifle as he holds a position in the northern Syrian city of Aleppo on Feb. 11, 2014.
Ameer Alhalbi, AFP/Getty ImagesA Syrian man walks past a bus set ablaze following a reported airstrike in the rebel-held Salaheddin district of Aleppo on Sept. 25, 2016.
George Ourfalian, AFP/Getty ImagesSmoke billows following the detonation of explosives placed by Syrian government forces inside a tunnel that was reportedly used by rebels in the government-controlled part of Aleppo on May 19, 2015.
George Ourfalian, AFP/Getty ImagesA member of Syrian pro-government forces inspects a building in west Aleppo's Ithaa district on Dec. 11, 2016. after they retook the area from rebel fighters.
George Ourfalian, AFP/Getty ImagesSmoke rises from reported opposition fire from buildings in an eastern government-held neighborhood in the northern Syrian city of Aleppo on October 20, 2016.
Zein Al-Rifai, AFP/Getty ImagesSyrians stand amidst the destruction in the northern Syrian city of Aleppo on May 30, 2015.
George Ourfalian, AFP/Getty ImagesA Syrian pro-government forces vehicle drives past damaged buildings on Nov. 27, 2016, in the Masaken Hanano district in eastern Aleppo, a day after it was seized from rebel fighters.
Anadolu Agency, Getty ImagesMembers of Free Syrian Army and Ahrar ash-Sham forces take position in the rubble of a building as they stage a joint operation against regime forces in Old Aleppo, Syria, on April 28, 2015.
Zein Al-Rifai, AFP/Getty ImagesA rebel fighter stands in a building overlooking the damage from fighting in the city of Aleppo on Dec. 16, 2013.
George Ourfalian, AFP/Getty ImagesSyrian security forces evacuate medical staff after rockets reportedly fired by rebels hit Al-Dabbeet hospital in the government-controlled neighborhood of Muhafaza in the northern city of Aleppo on May 3, 2016
Karam Al-Masri, AFP/Getty ImagesA Syrian man walks past destroyed buildings on May 2, 2016, in Aleppo's Bab al-Hadid neighborhood which was targeted recently by regime airstrikes.
Zein Al-Rifai, AFP/Getty ImagesA rebel fighter holds a position in al-Mayasat, a rebel-controlled area near the industrial zone of the northern Syrian city of Aleppo, on Feb. 4, 2015.
APIn this photo released by the Syrian official news agency SANA, smoke rises in green government buses, in Idlib province, Syria, Sunday, Dec. 18, 2016. Activists said, militants have burned at least five buses assigned to evacuate wounded and sick people from two villages in northern Syria. The incident could scuttle a wider deal that encompasses the evacuation of thousands of trapped rebel fighters and civilians from the last opposition foothold in east Aleppo.
STR / APSyrians evacuated from the embattled Syrian city of Aleppo during the ceasefire arrive at a refugee camp in Rashidin, near Idlib, Syria, on Dec. 20, 2016. Russian Foreign Minister Sergey Lavrov said on Tuesday that Russia, Iran and Turkey are ready to act as guarantors in a peace deal between the Syrian government and the opposition. He spoke on Tuesday after a meeting of the three countries' foreign ministers in Moscow.
Mursel Coban, APA Turkish army tank stands as Turks work to build a new Ottoman tomb in Esme village in Aleppo province in Syria on Feb. 22, 2015.
George Ourfalian, AFP/Getty ImagesA member of Syrian pro-government forces inspects an area on Nov. 27, 2016, in the Masaken Hanano district in eastern Aleppo, a day after it was seized from rebel fighters.
Ameer Alhalbi, AFP/Getty ImagesSyrians evacuate an injured man amid the rubble of destroyed buildings following a reported airstrike on the rebel-held neighborhood of Al-Qatarji in the northern Syrian city of Aleppo on April 29, 2016.
Karam Al-Masri, AFP/Getty ImagesA Syrian man waits to fill jerricans with water in front of destroyed buildings on May 2, 2016, in Aleppo's Bab al-Hadid neighborhood .
Saleh Abo Ghaloun / AFP/Getty ImagesSyrian opposition fighters fire towards positions held by Islamic State group jihadists in al-Bab on the northeastern outskirts of the northern embattled city of Aleppo on December 13, 2016.
Georges Ourfalian, AFP/Getty ImagesA wounded Syrian child is rushed into a hospital after she was hit by mortar shells that targeted Aleppo's government-controlled Aziziyah and Suleimaniyah neighborhoods on Sept. 28, 2016.
Philippe Desmazes, AFP/Getty ImagesSyrian rebels run to take position in the Bustan al-Basha district in the northern city of Aleppo on Oct. 26, 2012.
Fadi Al-Halabi, AFP/Getty ImagesRebel fighters walk past a heavily damaged building on Oct. 23, 2014, in the Bustan Pasha neighborhood of Syria's northern city of Aleppo.
Pavel Golovkin / APLt. Gen. Sergei Rudskoi of the Russian military's General Staff speaks to the media with a map of the area around Aleppo seen in the background at the Russian Defense Ministry's headquarters in Moscow, Russia, on Oct. 17, 2016. Rudskoi was quoted by Russian news agencies as saying Monday that Russian and Syrian forces will halt their fighting from 8 a.m. to 4 p.m. on Oct. 20 in order to allow civilians and rebels safe passage out of the city as well as for the evacuation of the sick and wounded.
Baraa Al-Halabi, AFP/Getty ImagesPeople walk through the rubble following a reported air strike attack by government forces on the Hanano district of the northern Syrian city of Aleppo on Feb. 13, 2014.
John Cantlie, AFP/Getty ImagesA rebel fighter throws a grenade toward a Syrian government forces position down an alleyway in the northern Syrian city of Aleppo on Nov. 6, 2012.
Karam Al-Masri, AFP/Getty ImagesSyrian civil defence volunteers evacuate people from a damaged building following a reported airstrike on April 23, 2016 in the rebel-held neighborhood of Tareeq al-Bab in the northern city of Aleppo.
Georges Ourfalian, AFP/Getty ImagesSyrian security forces and residents gather near a building that was reportedly hit by rebel shelling as they search for survivors in the Hamdaniyeh district on the government-controlled side of Aleppo on June 4, 2016.
George Ourfalian, AFP/Getty ImagesSyrian pro-government forces adjust a man-portable anti-tank system as they hold a position in the Hatabat al-Bab area in Aleppo's eastern countryside on January 24, 2016, during a military operation against Islamic State.
George Ourfalian, AFP/Getty ImagesSyrian pro-government forces hold a position as smoke billows following an airstrike on an Islamic State position in the Hatabat al-Bab area in Aleppo's eastern countryside on Jan. 24, 2016.
APIn this still image taken from video from Syria TV ,vehicles wait to cross into east Aleppo at Ramouseh crossing point on Dec. 18, 2016.
George Ourfalian, AFP/Getty ImagesSyrian pro-government fighters fire a Russian 122mm howitzer gun as they advance in the recently recaptured village of Joubah during an offensive towards the area of Al-Bab in Aleppo province on Nov. 25, 2016.
Karam Al-Masri, AFP/Getty ImagesSmoke is seeing rising on a main road in the Salaheddin neighbourhood of Syria's northern city of Aleppo following a reported air strike on April 24, 2016.
Syrian Civil Defense White Helmets via APSyrians inspect damaged buildings after airstrikes by government helicopters on the rebel-held Aleppo neighborhood of Mashhad, Syria, on Sept. 27, 2016.
George Ourfalian, AFP/Getty ImagesA fighter from the Syrian pro-government forces mans a riffle inside a damaged house in the recently recaptured village of Joubah during an offensive towards the area of Al-Bab in Aleppo province on Nov. 25, 2016.
JM Lopez, AFP/Getty ImagesRebel fighters duck as they run behind a barricade to avoid being fired at by Syrian regime forces in the Old City's front line in Aleppo on Sept. 18, 2013.
Pierre Torres, AFP/Getty ImagesFighters carrying food supplies run for cover along a street in the Salaheddin district of the restive city of Aleppo on July 29, 2012.
Odd Andersen, AFP/Getty ImagesA rebel fighter carries his son after the Friday prayer in the al-Fardos neighborhood of Aleppo on Dec. 7, 2012.
George Ourfalian, AFP/Getty ImagesSyrians react as they arrive at a hospital in the government-controlled side of the northern city of Aleppo following fighting between regime forces and rebels on April 28, 2016.
Francisco Leong, AFP/Getty ImagesSyrian rebels celebrate next to the remains of a Syrian government fighter jet which was shot down at Daret Ezza, on the border between the provinces of Idlib and Aleppo, on Nov. 28, 2012.
Khalil Hamra, APRebels clean their weapons and check ammunition at their base on the outskirts of Aleppo, Syria, on Nov. 14, 2012.
George Ourfalian, AFP/Getty ImagesSyrians look at the damage after rockets reportedly fired by rebels hit Al-Dabbeet hospital in the government-controlled neighborhood of Muhafaza in the northern city of Aleppo on May 3, 2016.
STRINGER / AFP/Getty ImagesBuses which will be used to evacuate rebel fighters and their families from rebel-held areas of Aleppo are seen waiting on Dec. 15, 2016.
Zein Al-Rifai, AFP/Getty ImagesRescure workers walk past a damaged building following an alleged Syrian government barrel bomb attack in the northern Syrian city of Aleppo on Sept. 5, 2014.
Karam aL-Masri / AFP/Getty ImagesSyrians leave a rebel-held area of Aleppo towards the government-held side on December 13, 2016 during an operation by Syrian government forces to retake the embattled city.
George Ourfalian, AFP/Getty ImagesSyrian emergency personnel secure a street after rockets reportedly fired by rebels hit Al-Dabbeet hospital in the government-controlled neighborhood of Muhafaza in the northern city of Aleppo on May 3, 2016.
Georges Ourfalian, AFP/Getty ImagesSyrian emergency personnel and residents search for survivors amid the rubble of a destroyed building following reported shelling by rebel fighters in the Hamdaniyeh district of the government-controlled side of Aleppo on June 4, 2016.
AFP/Getty ImagesAn image grab taken from a video uploaded on YouTube on Aug. 7, 2012, shows Syrians inspecting damage in the Bustan al-Qasr district of the northern city of Aleppo on Aug. 6, 2012.
Thaer Mohammed, AFP/Getty ImagesA man walks on the rubble of a destroyed building following reported air strikes by government forces in the rebel-held Shaar neighborhood in the northern city Aleppo on June 8, 2016.
AFP/Getty ImagesAn image grab taken from a video uploaded on YouTube on July 23, 2012, shows Syrian rebel fighters battling government troops in the northern city of Aleppo.
Uncredited / APEastern Aleppo residents wait in the streets to be evacuated from the war-torn city of Aleppo, Syria, on Dec. 15, 2016.
STR / APArmed Syrian fighters evacuated from the embattled Syrian city of Aleppo during the ceasefire arrive at a refugee camp in Rashidin, near Idlib, Syria, on Dec. 20, 2016.
Zac Baillie, AFP/Getty ImagesA woman and her baby are seen through the scope of an opposition fighter's sniper gun as she flees the Saif al-Dawla neighborhood of the Syrian northern city of Aleppo on Aug. 29, 2012.
Bulent Kilic, AFP/Getty ImagesA fighter from the Syrian opposition aims fire during clashes with forces loyal to President Bashar al-Assad in the center of Syria's restive northern city of Aleppo on July 25, 2012.
Syrian Civil Defense White Helmets / APIn this photo provided by the Syrian Civil Defense group known as the White Helmets, heavily damaged buildings are seen after airstrikes hit in Aleppo, Syria, on Sept. 24, 2016.
Karam Al-Masri, AFP/Getty ImagesSyrian civilians and rescuers gather at site of government forces airstrikes in the rebel held are of Al-Shaar in Aleppo on Sept. 27, 2016.
Zein Al-Rifai, AFP/Getty ImagesA woman sits on a wheelchair as she is brought into the emergency room of a hospital after an alleged barrel bomb was dropped on the Hanano neighborhood in the eastern district of the northern Syrian city of Aleppo on Aug. 9, 2014.
Karam Al-Masri, AFP/Getty ImagesSyrians surround a man as he cries over the body of his child after she was pulled from the rubble of a budling following government airstrikes in the rebel-held are of Al-Shaar in Aleppo on Sept. 27, 2016.
Getty ImagesSyrian residents, fleeing violence in the restive Bustan al-Qasr neighbourhood, arrive in Aleppo's Fardos neighbourhood on December 13, 2016, after regime troops retook the area from rebel fighters.
AFP/Getty ImagesSyrian pro-regime fighters gesture as they drive past resident fleeing violence in the restive Bustan al-Qasr neighborhood in Aleppo on Dec. 13, 2016, after regime troops retook the area from rebel fighters.
Karam Al-Masri, AFP/Getty ImagesA Syrian family walks past destroyed buildings on May 2, 2016, in the northern city of Aleppo.
Karam Al-Masri, AFP/Getty ImagesA Syrian boy is comforted as he cries next to the body of a relative who died in a reported airstrike on April 27, 2016, in the rebel-held neighborhood of al-Soukour in the northern city of Aleppo.
Uncredited / APIn this photo released by the Syrian official news agency SANA, civilians gather near Red Cross vehicles for evacuation from eastern Aleppo on Dec. 16, 2016.
Mohammed Al-Khatieb, AFP/Getty ImagesMedical personnel look for survivors following a reported airstrike on the Tariq al-Bab district of the northern Syrian city of Aleppo on Feb. 1, 2014.
George Ourfalian, AFP/Getty ImagesSyrian men carry an injured youth in the government-controlled side of the northern city of Aleppo following fighting between regime forces and rebels on April 28, 2016.
AFP/Getty ImagesA Syrian opposition fighter looks out at a street blocked with rubble in the al-Jadeida neighborhood in the Old City of Syria's northern city of Aleppo on Nov. 26, 2012.
George Ourfalian, AFP/Getty ImagesSyrian emergency personnel secure a street after rockets reportedly fired by rebels hit Al-Dabbeet hospital in thr government-controlled neighborhood of Muhafaza in the northern city of Aleppo on May 3, 2016.
STR / APA Syrian child evacuated from the embattled Syrian city of Aleppo during the ceasefire arrives at a refugee camp in Rashidin, near Idlib, Syria, on Dec. 20, 2016. Russian Foreign Minister Sergey Lavrov said on Tuesday that Russia, Iran and Turkey are ready to act as guarantors in a peace deal between the Syrian government and the opposition. He spoke on Tuesday after a meeting of the three countries' foreign ministers in Moscow.
Javier Manzano, AFP/Getty ImagesSyrian women and children run to the basement of a building housing several rebel fighters as regime tanks and helicopters attack their positions in Aleppo on Nov. 1, 2012.
Youssef Karwashan / AFP/Getty ImagesBuses which will be used to evacuate rebel fighters and their families from rebel-held areas of Aleppo are seen waiting on Dec. 15, 2016.
George Ourfalian, AFP/Getty ImagesSmoke rises from reported opposition fire from buildings in an eastern government-held neighborhood in the northern Syrian city of Aleppo on Oct. 20, 2016, as clashes erupted in an area designated as a humanitarian corridor for civilians to leave the embattles city, an AFP journalist said, despite an announced pause in the Syrian army's Russian-backed offensive.
MIguel Medina, AFP/Getty ImagesA Syrian rebel fires towards regime forces as his comrade ducks for cover during clashes in the old city of Aleppo in northern Syria on Sept. 30, 2012.
APThis photo made from the footage taken from Russian Defense Ministry official web site on Nov. 2, 2015, shows a target hit during a Russian air raid in Syria. Russian Defense Ministry said the strike was performed by an Su-34M bomber in Aleppo province.
APIn this photo released by the Syrian official news agency SANA, smoke rises in green government buses, in Idlib province, Syria, Sunday, Dec. 18, 2016.
Achilleas Zavallis, AFP/Getty ImagesA Syrian man wounded by shelling sits on a chair outside a closed shop in the Al-Muasalat area in Aleppo on Sept. 4, 2012.
George Ourfalian, AFP/Getty ImagesSyrian pro-government forces walk around Aleppo's western Minyan district on Nov. 10, 2016.
Ameer Alhalbi, AFP/Getty ImagesA man gestures amid the rubble of destroyed buildings following a reported air strike on the rebel-held neighborhood of al-Kalasa in the northern Syrian city of Aleppo on April 28, 2016.
Baraa Al-Halabi, AFP/Getty ImagesA Syrian girl collects her belongings from rubble on April 21, 2014, after her building was reportedly destroyed in an airstrike by government forces in the northern city of Aleppo.
Thaer Mohammed, AFP/Getty ImagesMalek Barghout, second from left, mourns the death of his father, who was killed earlier in the day following a reported airstrike by Syrian government forces on the rebel-held neighborhood of al-Sakhour in the northern city of Aleppo on June 4, 2016.
Khaled Khateb, AFP Getty ImagesPeople walk past a damaged building in the al-Kalasa neighborhood of the northern Syrian city of Aleppo on July 19, 2015.
Karam Al-Masri, AFP/Getty ImagesCivilians photographed in a damaged building in Syria's northern city of Aleppo following a reported airstrike by government forces on Dec. 7, 2015.
George Ourfalian / AFP/Getty ImagesSyrian pro-government forces walk in Aleppo's Bustan al-Qasr neighbourhood after they captured the area in the eastern part of the war torn city on December 13, 2016.
AFP/Getty ImagesA vehicle of the International Red Cross is seen in the embattled city of Aleppo before the start on an evacuation operation of rebel fighters and their families from rebel-held areas on December 15, 2016.
Zein Al-Rifai, AFP/Getty ImagesSmoke rises following a reported barrel bomb attack by Syrian government forces in the northern city of Aleppo on Aug. 14, 2014.
Omar Haj Kadour / AFP/Getty ImagesRebel fighters from the Jaish al-Fatah (or Army of Conquest) brigades fires mortar shells toward western government-controlled districts near Aleppo on Oct. 30, 2016.
George Ourfalian, AFP/Getty ImagesA tank maneuvers in west Aleppo's Ithaa district after Syrian pro-government forces retook the area from rebel fighters on Dec. 11, 2016.
Karam Al-Masri, AFP/Getty ImagesSyrian rescuers hand the body of a girl down to civilians on the ground after she was pulled from rubble of a budling following government airstrikes in the rebel held are of Al-Shaar in Aleppo on Sept. 27, 2016.
Fabio Bucciarelli, AFP/Getty ImagesA Syrian rebel fires toward an army position in the Karm al-Jabal district of the northern city of Aleppo on Oct. 22, 2012.
KARAM AL-MASRI / AFP/Getty ImagesMembers of the Syrian Civil Defence, known as the White Helmets, search for victims amid the rubble of a destroyed building following reported air strikes in the rebel-held Qatarji neighbourhood of the northern city of Aleppo, on October 17, 2016. Dozens of civilians were killed as air strikes hammered rebel-held parts of Aleppo early morning, despite Western warnings of potential sanctions against Syria and Russia over attacks on the city.
APThis image made from video and posted online, shows a building on fire after airstrikes hit Aleppo, Syria, on April 28, 2016.
Zein Al-Rifai, AFP/Getty ImagesA general view shows destroyed buildings following reported barrel-bomb strikes by government forces on the eastern Masir neighborhood of the northern Syrian city of Aleppo on Aug. 8, 2014.
Thaer Mohammed, AFP/Getty ImagesA member of the Syrian Civil Defence, known as the White Helmets, rescues Maarouf, a 12-year-old Syrian boy, from the rubble of a building following a reported air strike on the rebel-held Qaterji neighborhood in the northern city of Aleppo on Oct. 16, 2016.
Phil Moore, AFP/Getty ImagesA Syrian rebel from the Free Syrian Army fires his rifle down a street toward government snipers in the Bab Al-Nasr district of the northern restive city of Aleppo on Aug. 10, 2012.
APIn this image made from video and posted online, a man carries a child after airstrikes hit Aleppo, Syria, on April 28, 2016.
George Ourfalian, AFP/Getty ImagesA Syrian pro-government fighter looks on from his sniper nest in a building in Aleppo's western Minyan district on Nov. 10, 2016.
Fadi Al-Halabi, AFP/Getty ImagesChildren warm up with the heat of an armchair burning in the Hanano district of the northern Syrian city of Aleppo on Feb. 15, 2014.
APSyrians look at the damage after rockets reportedly fired by rebels hit Al-Dabbeet hospital in the government-controlled neighborhood of Muhafaza in the northern city of Aleppo on May 3, 2016.
AFP/Getty ImagesA Syrian pro-regime fighter speaks with a child as residents flee violence in the restive Bustan al-Qasr neighbourhood in Aleppo on Dec. 13, 2016, after regime troops retook the area from rebel fighters.
Karam Al-Masri, AFP/Getty ImagesSmoke billows from the district of Dahiyet al-Assad after an attack by rebels on Syrian regime forces in the northern city of Aleppo on Oct. 29, 2016.
George Ourfalian, AFP/Getty ImagesSyrian pro-government forces walk around in Aleppo's western Minyan district on Nov. 10, 2016.
Karam al-Masri / AFP/Getty ImagesAn injured man sits inside an ambulance as Syrian rebels and their families gather in the rebel-held al-Amiriyah neighborhood while waiting to be evacuated to the government-controlled area on the southern outskirts of the city on Dec. 15, 2016.
Ameer Alhalbi, AFP/Getty ImagesSyrians look at the damage following a reported airstrike by governement forces on the rebel-held neighborhood of Sakhur in the northern city of Aleppo on April 24, 2016.
George Ourfalian, AFP/Getty ImagesA member of Syrian pro-government forces stands in west Aleppo's Ithaa district on Dec. 11, 2016, after they retook the area from rebel fighters.
Thaer Mohammed, AFP/Getty ImagesSyrian emergency personnel douse flames following a reported airstrike in the rebel-held al-Sakhour district of the northern city of Aleppo on June 4, 2016.
Baraa Al-Halabi, AFP/Getty Images
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A Syrian man cries as he sits on the rubble of a building following a reported barrel-bomb attack by Syrian government forces on Aug. 11, 2014, in the northern Syrian city of Aleppo.
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The nearly six-year Syrian war has intensified in recent days, as Syrian government and Russian forces supporting President Bashar Assad are overtaking rebel forces in Aleppo. Tens of thousands of people are reportedly trapped in Eastern Aleppo, as a planned cease-fire and evacuation deteriorated Wednesday. Residents and journalists in Aleppo are taking to social media — Twitter, YouTube, Periscope and other platforms — to report their situations. It is difficult to verify any political connections of those who are posting, so they are identified by the self-written descriptions provided in their Twitter profiles.