1.   A rescue helicopter is on its way.

2.   Helicopters are not suitable for long-distance service.

3.   Medical helicopters were so fast and efficient that a GI wounded in action could be on an operating table within fifteen minutes.

4.   We huddled together, secure in the knowledge that the rescue helicopter was on its way.

5.   There were two helicopters circling around.

6.   There are two helicopters available for reconnaissance.

7.   The Israeli Defence Forces announce that helicopters are to be used to suppress the intifada.

8.   Ambulancemen believe helicopters are now vital everyday tools of their trade.

9.   Three Sea-King helicopters are involved in the search.

10.   This Twin Squirrel helicopter is identical to the one being manufactured for joint use by the Northamptonshire, Leicestershire and Warwickshire forces.