NATO SESSION U.S. Army Gen. Martin E. Dempsey, chairman of the Joint Chiefs of Staff, joins fellow NATO defense chiefs for the 173rd NATO Military Committee meeting in Brussels, May 20, 2015. The meetings will focus on a wide range of issues confronting the alliance. SHARE: Download: Full Size (0.07 MB) Credit: VIRIN: 523641-W-SPS55-844.jpg Photo Gallery