Ambassador Martin soon sent word back to Major Kean that sorties would continue to be flown. At the same time, General Carey met with Admiral Whitmire to convince him to resume flights to the embassy despite pilot weariness and poor visibility caused by darkness, fires and bad weather. By 02:15 on 30 April, one CH-46 and one CH-53 were landing at the embassy every 10 minutes at this time the embassy indicated that another 19 lifts would complete the evacuation. At that time Major Kean estimated that there were still some 850 non-American evacuees and 225 Americans (including the marines), Ambassador Martin told Major Kean to do the best he could. At 03:00, Ambassador Martin ordered Major Kean to move all the remaining evacuees into the parking lot LZ which was the marines' final perimeter. At 03:27 President Gerald Ford ordered that no more than 19 additional lifts be allowed to complete the evacuation. At 04:30 with the 19 lift limit already exceeded, Major Kean went to the rooftop LZ and spoke over a helicopter radio with General Carey who advised that President Ford had ordered that the airlift be limited to U.S. personnel and General Carey, Commanding General, 9th MAB, ordered Major Kean to withdraw his men into the chancery building and withdraw to the rooftop LZ for evacuation. Major Kean returned the ground floor of the chancery and ordered his men to withdraw into a large semicircle at the main entrance to the chancery. Most of the marines were inside the chancery when the crowds outside the embassy broke through the gates into the compound. The marines closed and bolted the chancery door, the elevators were locked by Seabees on the 6th floor and the marines withdrew up the stairwells locking grill gates behind them. On the ground floor a water tanker was driven through the chancery door, and the crowd began to surge up through the building toward the rooftop. The marines on the rooftop had sealed the doors to the rooftop and were using mace to discourage the crowd from trying to break through. Sporadic gunfire from around the embassy passed over the rooftop. At 04:58 Ambassador Martin boarded a USMC CH-46, call-sign "Lady Ace 09" of HMM-165 and was flown to the . When Lady Ace 09 transmitted "Tiger is out", those helicopters still flying thought the mission was complete, thereby delaying the evacuation to the marines from the embassy rooftop.