21.   Nor do NATO commanders anticipate that American helicopters will be needed if fighting breaks out and NATO units have to pull back.

22.   Occasionally, American helicopters flew near the mountains, then swooped away.

23.   Of the eight American helicopters sent on the mission, three broke down in the first stage of the operation.

24.   On the other is a military base and airport where American and British special forces are based and American helicopters land at night.

25.   Other photos show a Vietnamese prisoner being pushed to his death from an airborn American helicopter, and a GI carrying a head and torso.

26.   Others said American forces would be directly involved, perhaps including American helicopters and planes to be used to make the actual pickups of peacekeeping units.

27.   So far the discussion has assumed you would need American helicopters and air support to deploy, especially to a place like the enclave of Gorazde.

28.   That tendency to try to exploit perceived missteps by the U.S. military led to quick action over the weekend after an American helicopter carrying elite forces crashed in Afghanistan.

29.   The accident was at least the sixth involving an American helicopter in or around Afghanistan since the war began.

30.   The air war continues as U.S. officials deny a report that an American helicopter crashed on the Afghan-Pakistan border.