21.   Earlier in the week the troops had safeguarded the hotel as U.S. military helicopters used its landing pad as the pickup point for foreigners.

22.   Earlier in the week the troops had been safeguarding the hotel as U.S. military helicopters used its landing pad as the pickup point for foreigners trying to flee.

23.   Often the landing pads are on concrete that is not fully covered.

24.   One helicopter swooped down on a small landing pad at the back of the sprawling embassy compound, picked up Johnson and ferried him away amid heavily armed protection.

25.   One helicopter swooped down on a small landing pad at the back of the sprawling embassy compound, picked up Johnson and ferried him away amid tight security.

26.   The Inchon is a mine countermeasures command and control ship that serves as a landing pad for helicopters used in mine-hunting missions.

27.   The proposed helicopter landing pad just offshore from the city of Nago would replace a U.S. air base in the heart of the Okinawan city of Futenma.

28.   The United Nations tried evacuation by helicopter, but the Serbs shelled the landing pad.

29.   The U.N. tried helicopter evacuation, but the Serbs shelled the landing pad.

30.   Usually packed with tourists, the esplanade was briefly turned into a landing pad so the helicopter could set down.