Sarah made landfall on Wake Island at peak intensity with winds up to 145-knots, causing widespread damage. The intensity of the storm had the beneficial effect of greatly accelerating the cleanup effort by clearing the harbor and scouring the coast. Oil did remain, however, embedded in the reef's flat crevices and impregnated in the coral. The storm also had broken the wrecked vessel into three sections and, although delayed by rough seas and harassment by blacktip reef sharks, the salvage team used explosives to flatten and sink the remaining portions of the ship that were still above water. U.S. Air Force assumes control In the early 1970s, higher-efficiency jet aircraft with longer-range capabilities lessened the use of Wake Island Airfield as a refueling stop, and the number of commercial flights landing at Wake declined sharply. Pan Am had replaced many of its Boeing 707s with more efficient 747s, thus eliminating the need to continue weekly stops at Wake. Other airlines began to eliminate their scheduled flights into Wake. In June 1972 the last scheduled Pan Am passenger flight landed at Wake, and in July Pan Am's last cargo flight departed the island, marking the end of the heyday of Wake Island's commercial aviation history. During this same time period the U.S. military had transitioned to longer-range C-5A and C-141 aircraft, leaving the C-130 as the only aircraft that would continue to regularly use the island's airfield. The steady decrease in air traffic control activities at Wake Island was apparent and was expected to continue. On June 24, 1972, responsibility for the civil administration of Wake Island was transferred from the FAA to the United States Air Force under an agreement between the Secretary of the Interior and the Secretary of the Air Force. In July, the FAA turned over administration of the island to the Military Airlift Command (MAC), although legal ownership stayed with the Department of the Interior, and the FAA continued to maintain the air navigation facilities and provide air traffic control services. On December 27, the Chief of Staff of the Air Force (CSAF) General John D. Ryan directed MAC to phase out en-route support activity at Wake Island effective June 30, 1973. On July 1, 1973, all FAA activities ended and the U.S. Air Force under Pacific Air Forces (PACAF), Detachment 4, 15th Air Base Wing assumed control of Wake Island. In 1973, Wake Island was