11.   Because of safety concerns, the MIA task force scaled back searches and grounded helicopters for its last mission in July.

12.   But for two days, rescue helicopters were grounded by bad weather.

13.   Coastal fog grounded the helicopter Monday.

14.   Ekeus said he grounded helicopters, which are flown by Chilean crews, and canceled aircraft overflights to avoid any accidental shootdowns.

15.   Ekeus said he grounded helicopters and cancelled aircraft overflights to avoid any accidental shootdowns.

16.   Helicopters were grounded much of the time.

17.   Heavy rains during the past few days had grounded many helicopters and clogged some key roads, and food supplies were beginning to back up in warehouses.

18.   His helicopters were temporarily grounded by the government in June after Soruss aircraft, made and insured in the former Soviet Union, were found to be unsafe.

19.   Rescue helicopters were grounded Wednesday because of worsening weather, officials said.

20.   Strong winds, fog and rain have repeatedly grounded helicopters and hampered rescue efforts.