U.S. Navy Adm. Mike Mullen, right, chairman of the Joint Chiefs of Staff, shakes hands with U.S. Army Col. Tarek Mekhail, defense attache for the U.S. Embassy in Saudi Arabia, during a visit to Riyadh, Saudi Arabia, Feb. 17, 2010. U.S. Navy Adm. Mike Mullen, right, chairman of the Joint Chiefs of Staff, shakes hands with U.S. Army Col. Tarek Mekhail, defense attache for the U.S. Embassy in Saudi Arabia, during a visit to Riyadh, Saudi Arabia, Feb. 17, 2010. SHARE: Download: Full Size (1.56 MB) Tags: Photo Essays Credit: VIRIN: 166759-O-EJO50-529.jpg Photo Gallery