Kerry said on September 9 in response to a reporter's question about whether Syrian President Bashar al-Assad could avert a military strike: "He could turn over every single bit of his chemical weapons to the international community in the next week. Turn it over, all of it, without delay, and allow a full and total accounting for that. But he isn't about to do it, and it can't be done, obviously." This unscripted remark initiated a process that would lead to Syria agreeing to relinquish and destroy its chemical weapons arsenal, as Russia treated Kerry's statement as a serious proposal. Russian Foreign Minister Sergey Lavrov said Russia would work "immediately" to convince Syria relinquish and destroy its large chemical weapons arsenal. Syria quickly welcomed this proposal and on September 14, the UN formally accepted Syria's application to join the convention banning chemical weapons, and separately, the U.S. and Russia agreed on a plan to eliminate Syria's chemical weapons by the middle of 2014. On September 28, the UN Security Council passed a resolution ordering the destruction of Syria's chemical weapons and condemning the August 21 Ghouta attack.