US Navy 111217-D-BW835-003 U.S. Defense Secretary Leon E. Panetta, right, tours a cemetery on the shores of Tripoli, Libya

TRIPOLI, Libya (Dec. 17, 2011) U.S. Defense Secretary Leon E. Panetta, right, tours a cemetery on the shores of Tripoli, Libya, where as many as 13 U.S. Sailors are buried, killed in 1804 when the Navy ship Intrepid exploded while slipping into Tripoli harbor to attack pirate ships that had captured the American Navy frigate Philadelphia. Panetta is the first U.S. defense secretary to visit Libya. (DOD photo by Erin A. Kirk-Cuomo/Released)