LEADERS GREETING Navy Adm. Mike Mullen, left, chairman of the Joint Chiefs of Staff, and Defense Secretary Robert M. Gates, right, greet Sen. Joseph I. Lieberman and Sen. Carl Levin before a Senate Armed Services Committee hearing on operations in Libya at the Dirksen Senate Office Building in Washington, D.C., March 31, 2011. SHARE IMAGE: Download Image: Full Size (0.06 MB) Photo By: VIRIN: 520575-N-NBJ65-426.jpg Photo Gallery