Smoke from fighting billows on the edges of Hama, Syria, Dec. 3. Omar Albam/AP hide caption
President Bashar al-Assad
Antigovernment fighters brandish their guns as they ride a vehicle in Syria's northern city of Aleppo on Nov. 30. Omar Haj Kadour/AFP hide caption
Who are the rebels who have seized control of Aleppo, Syria?
Syrian President Bashar Assad gestures while speaking to Russian Foreign Minister Sergey Lavrov during talks in Damascus in September. Assad and his wife, Asma, have been diagnosed with coronavirus infection, according to an official statement. Russian Foreign Ministry Press Service/AP hide caption
A sign outside Germany's highest appellate court in Karlsruhe. Two former members of the Syrian secret service were arrested in Germany on Tuesday, the Federal Prosecutor announced. A third man, was arrested in Paris. Thomas Kienzle/AP hide caption
A member of the Syrian Civil Defense, also known as the "White Helmets," walking through the wreckage of their center, which was destroyed Thursday by government forces in the town of al-Tamana in rebel-held Idlib province. Omar Haj Kadour/AFP/Getty Images hide caption
The Damascus sky lights up with missile fire as a U.S.-led coalition launches an attack early Saturday, targeting different parts of the Syrian capital. Hassan Ammar/AP hide caption
A medical worker at a Damascus hospital holds a sign protesting a suspected chemical weapons attack outside the Syrian capital a year ago. The suspected attacks led the U.S. to fire a barrage of missiles at a Syrian air base on April 7, 2017. Sameer Al-Doumy/AFP/Getty Images hide caption
A picture taken on April 4 shows destruction at a hospital room in Khan Sheikhun, a rebel-held town in the northwestern Syrian Idlib province, following a chemical weapons attack. Omar Haj Kadour/AFP/Getty Images hide caption
Secretary of State John Kerry tells NPR that the new U.S.-Russia ceasefire deal in Syria is the best option under the circumstances. Without it, he says, there would be more deaths. Ariel Zambelich/NPR hide caption
Secretary Of State John Kerry On Syria Cease-Fire: 'What's The Alternative?'
A first responder in the rebel-held city of Aleppo carries a child who was wounded in a government airstrike on Sept. 16. Karam Al-Masri/AFP/Getty Images hide caption
In Syria, Health Care Workers Are The Heroes — And The Targets
Russian President Vladimir Putin shakes hands with Syrian President Bashar Assad during Tuesday's meeting at the Kremlin in Moscow. RIA Novosti/Reuters/Landov hide caption
A rebel fighter takes aim during a training session in Eastern al-Ghouta, a rebel-held region outside the capital Damascus, earlier this month. Russia is inviting Syrian opposition groups to peace talks in Moscow, but few of them want to go to a country that supports Syrian President Bashar al-Assad. Abd Doumany/AFP/Getty Images hide caption
Syrian Opposition Groups Wary Of Russia's Invitation To Moscow
President Obama walks out of a meeting with the Senate Democratic Caucus at the Capitol on Tuesday. Michael Reynolds/EPA /LANDOV hide caption
A rebel fighter raises his weapon after firing a missile Sunday toward Syrian government troops in the northern city of Aleppo. Syria's largest city has been the scene of heavy fighting for the past three months. Both sides control part of the city, and the fight has been a stalemate recently. Narciso Contreras/AP hide caption
An image taken from video obtained from the Shaam News Network, authenticated by AP reporting, shows attempts to rescue the wounded in Idlib, northern Syria following heavy bombing from military warplanes. Uncredited/ASSOCIATED PRESS hide caption