11.   Flights have been grounded and the staff has been instructed to stay at home starting on Wednesday.

12.   Flights were grounded.

13.   Last week, Swissair, the flag carrier in Switzerland, went into bankruptcy and grounded all flights worldwide.

14.   Officials at Van Nuys Airport requested additional police patrols, closed the control tower and sent home nonessential personnel after the FAA grounded all flights nationwide.

15.   Officials at Van Nuys Airport requested additional police patrols, closed the control tower and sent home non-essential personnel after the FAA grounded all flights nationwide.

16.   She had been boarding a plane to New York when all flights were grounded in response to the terrorist attacks.

17.   That flight was forced to land in St. Louis after the attack grounded all flights.

18.   The men had boarded the train after their airline flight was grounded Tuesday morning, the source said.

19.   They boarded a train for Texas after their flight was grounded in St. Louis.

20.   This week alone, pilots of the money-losing state-owned domestic airline, Air Inter, grounded all flights to and from Paris for two days.