Chief of Naval Operations U.S. Navy Adm. Jonathan Greenert, 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)