Peace out, fools! Obama plays the clown by flashing the peace sign in nuclear security summit world leaders 'team photo'... but David Cameron does NOT look impressed

Surrounded by world leaders (main picture), President Barack Obama (center and inset top right) gave the peace sign as they gathered for a 'team photo' during a two-day nuclear summit. 

All eyes were on Obama as 54 other presidents and prime ministers joined him in Washington, DC, for crunch talks on Iran and terrorist threats involving nuclear weapons. 

There was one set of eyes, however, that was particularly focused on the President - those of Prime Minister David Cameron (inset top right). 

Relations between Cameron and Obama have been strained since the President criticized the Prime Minister for getting 'distracted' during the crisis in Libya and turning it into a 's**t show'.