New Tests Link Syria's Assad to Deadly 2013 Sarin Gas Attack on Civilians

The Organisation for the Prohibition of Chemical Weapons compared samples taken by a U.N. mission in the Damascus suburb of Ghouta after the Aug. 21, 2013 attack, when hundreds of civilians died of sarin gas poisoning

Russian President Vladimir Putin, right, shakes hands with Syrian President Bashar Assad in the Bocharov Ruchei residence in the Black Sea resort of Sochi, Russia, on Nov. 20, 2017
Mikhail Klimentyev, Kremlin Pool Photo via AP