LONDON, ENGLAND - SEPTEMBER 09:  US Secretary of State John Kerry gestures during a joint press conference with Britain's Foreign Secretary William Hague at the the Foreign and Commonwealth Office on September 9, 2013 in London, England.  Secretary of State John Kerry who's on a two-day visit to London renewed U.S. allegations that Syria's President Bashar Assad launched a chemical weapons attack against his own people.  (Photo by Alastair Grant - WPA Pool/Getty Images)