The U.S. aircraft carrier Theodore Roosevelt and the nine warships in its battle group sailed through the Strait of Gilbraltar and into the Mediterranean early Wednesday, the Navy said. Lt. Ray Kempisty, a spokesman for the U.S. 6th Fleet, said the two Marine amphibious groups that sailed from the United States with the Roosevelt were still at Rota, Spain, but would soon follow the carrier group into the Mediterranean. The carrier group arrived a week after two F-14s from the aircraft carrier John F. Kennedy shot down two Libyan MiG 23s over the Mediterranean. The arrival of the Roosevelt gives the United States two carrier battle groups in the Mediterranean, but Kempisty said the Roosevelt is "basically a replacement for the Kennedy."