German Defense Chief Volker Wieker and U.S. Army Gen. Martin E. Dempsey, chairman of the Joint Chiefs of Staff, talk in between meetings at the NATO military committee and chiefs of defense conference in Brussels, Jan. 21, 2015. German Defense Chief Volker Wieker and U.S. Army Gen. Martin E. Dempsey, chairman of the Joint Chiefs of Staff, talk in between meetings at the NATO military committee and chiefs of defense conference in Brussels, Jan. 21, 2015. SHARE: Download: Full Size (1.09 MB) Tags: Photo Essays Credit: VIRIN: 629034-H-MXB60-821.jpg Photo Gallery