11.   But Air France officials said no such flight would take place before the Transportation Ministry ruled that Concordes could fly again.

12.   But few international flights can take place unless the governments at either end have agreed to them.

13.   But if the flight takes off and the seat is empty, the seat becomes worthless.

14.   But on this morning there were so few taxis that some people waited in line to get one for as long as the flight took.

15.   He noted that the tax is due only after the flight takes place.

16.   He predicted that the complaint level would go down as more flights take off on time.

17.   In his notes, he suggested that any test flight take place over water, and that the pilot be equipped with flotation devices.

18.   It is then that the flight takes an unusual turn.

19.   Only two international flights took off from Madrid and only trans-Atlantic flights were allowed to land.

20.   Some flights could not take off because planes never flew in.