(Reuters) - 2013 - U.S. Secretary of State John Kerry and Russian Foreign Minister Sergei Lavrov reach an agreement on the elimination of Syria's chemical weapons.
- U.N. Secretary General Ban Ki-moon establishes United Nations Mission to Investigate Allegations of the Use of Chemical Weapons in the Syrian Arab Republic. Headed by Swedish scientist Ake Sellstrom and comprised of experts from the World Health Organization and the Organisation for the Prohibition of Chemical Weapons (OPCW), it is tasked with looking into possible use of chemical weapons following reports of an attack in the northern town of Khan al-Assal. It confirms use of sarin in the Aug. 21 attack in the Damascus suburb Ghouta that killed hundreds.