US Navy sailors come off of the USS Carl Vinson aircraft carrier after the ship returned to its homeport at Naval Station North Island in Coronado, California June 15, 2011. The USS Carl Vinson returned from a seven month deployment that became historic last month when the aircraft carrier buried Osama bin Laden at sea. [Photo/Agencies]

US Navy Rear Admiral Samuel Perez, center, talks about the ship's mission after the USS Carl Vinson aircraft carrier returned to its homeport at Naval Station North Island in Coronado, California June 15, 2011. [Photo/Agencies]