Chairman of the Joint Chiefs of Staff Navy Adm. Mike Mullen autographs a flight suit prior to hosting the USO Holiday Tour, at Qatar, Dec. 17, 2007. Chairman of the Joint Chiefs of Staff Navy Adm. Mike Mullen autographs a flight suit prior to hosting the USO Holiday Tour, at Qatar, Dec. 17, 2007. SHARE IMAGE: Download Image: Full Size (5.22 MB) Tags: Photo Essays Photo By: VIRIN: 410881-O-LLF19-053.jpg Photo Gallery