U.S. General Petraeus, flanked by Britain's Chief of Defence Staff, Air Chief Marshal Stirrup, addresses journalists at 10 Downing Street in London

U.S. General David Petraeus (L), flanked by Britain's Chief of Defence Staff, Air Chief Marshal Jock Stirrup, addresses journalists after a meeting with British Prime Minister Gordon Brown at 10 Downing Street in London September 29, 2008. REUTERS/Andrew Winning (BRITAIN)