11.   Since the crash, the five remaining Air France Concordes and British Airways seven supersonic jets have been grounded until fuel tanks can be made less vulnerable to punctures.

12.   Snoopy never upgraded his aircraft from World War I vintage to supersonic jet.

13.   Supersonic jets took off from American aircraft carriers in the region.

14.   The comments were made earlier this month, as the Concord returned to service after a fatal crash grounded the supersonic jet for more than a year.

15.   The Concorde is the only passenger aircraft to have afterburners, which are common on supersonic military jets.

16.   The Concorde Lounge at Kennedy International Airport is designed to provide superior comfort to passengers on the British Airways supersonic jet.

17.   The NASA study is just one of several research programs under way on the supersonic jet.

18.   Their explosions, called supernovas, launch violent shock waves into their surroundings similar to the sonic boom following a supersonic jet.

19.   The U.S.-backed supersonic jet would have three times the capacity of the Concorde and fly twice as far.

20.   A number of industrialized countries have been cooperating to develop a new kind of supersonic jet plane along the lines of the French-British Concord.