U.S. Army Gen. Martin E. Dempsey, center, chairman of the Joint Chiefs of Staff, listens as British Prime Minister David Cameron talks during meetings with U.S. and British counterparts in London, June 10, 2014. U.S. Army Gen. Martin E. Dempsey, center, chairman of the Joint Chiefs of Staff, listens as British Prime Minister David Cameron talks during meetings with U.S. and British counterparts in London, June 10, 2014. SHARE: Download: Full Size (2.34 MB) Tags: photo essays Credit: VIRIN: 095449-K-DVX63-374.jpg Photo Gallery