1.   Federal officials grounded every airplane in the country.

2.   Since federal officials have grounded all aircraft, Bayflite, the helicopter that flies in to attend to trauma victims, is not available.

3.   Fearing a potential threat, U.S. officials temporarily grounded the agricultural planes.

4.   Following the crashes, officials grounded all Antonov aircraft and said they would tighten maintenance checks on civilian aircraft and raise the qualification requirements for pilots.

5.   U.N. officials grounded the humanitarian airlift to Sarajevo on Saturday after Serbs shut aid routes into the city.

6.   Venezuelan officials also temporarily grounded an American Airlines flight Wednesday because its tires lacked an information sticker.