security were withdrawing and arranging the demolition of the DAO office, American equipment, files, and cash. Air America UH-1s also participated in the evacuation. The original evacuation plans had not called for a large-scale helicopter operation at the United States Embassy, Saigon. Helicopters and buses were to shuttle people from the embassy to the DAO Compound. However, in the course of the evacuation it turned out that a few thousand people were stranded at the embassy, including many Vietnamese. Additional Vietnamese civilians gathered outside the embassy and scaled the walls, hoping to claim refugee status. Thunderstorms increased the difficulty of helicopter operations. Nevertheless, the evacuation from the embassy continued more or less unbroken throughout the evening and night. At 03:45 on the morning of 30 April, Kissinger and Ford ordered Martin to evacuate only Americans from that point forward. Reluctantly, Martin announced that only Americans were to be flown out, due to worries that the North Vietnamese would soon take the city and the Ford administration's desire to announce the completion of the American evacuation. Ambassador Martin was ordered by President Ford to board the evacuation helicopter. The call sign of that helicopter was "Lady Ace 09", and the pilot carried direct orders from President Ford for Ambassador Martin to be on board. The pilot, Gerry Berry, had the orders written in grease-pencil on his kneepads. Ambassador Martin's wife, Dorothy, had already been evacuated by previous flights, and left behind her suitcase so a South Vietnamese woman might be able to squeeze on board with her. "Lady Ace 09" from HMM-165 and piloted by Berry, took off at 04:58—had Martin refused to leave, the Marines had a reserve order to arrest him and carry him away to ensure his safety. The embassy evacuation had flown out 978 Americans and about 1,100 Vietnamese. The Marines who had been securing the embassy followed at dawn, with the last aircraft leaving at 07:53. 420 Vietnamese and South Koreans were left behind in the embassy compound, with an additional crowd gathered outside the walls. The Americans and the refugees they flew out were generally allowed to leave without intervention from either the North or South Vietnamese. Pilots of helicopters heading to Tan Son Nhat were aware that PAVN anti-aircraft guns were tracking them, but they refrained from firing. The Hanoi leadership, reckoning that completion of the evacuation would lessen the risk of American intervention,