Chief of Staff of the U.S. Air Force Gen. Mark A. Welsh III, right, talks with U.K. Chief of the Air Staff Air Chief Marshal Sir Andrew Pulford before a meeting with U.K. Prime Minister David Cameron, June 10, 2014, in London. The meeting was part of a defense chiefs strategic dialogue with the U.S. Joint Chiefs of Staff and their British counterparts. (DoD photo by Mass Communication Specialist 1st Class Daniel Hinton, U.S. Navy/Released)