1.   Because of the prohibitive costs of developing and operating the supersonic aircraft, no new ones are in the works.

2.   Air France grounded its fleet of five Concordes immediately after the crash and said the supersonic aircraft would remain on the ground indefinitely.

3.   British Airways, the only other airline to fly the supersonic aircraft, resumed its Concorde operations the day after the crash.

4.   Even before the crash, both airlines said the sleek supersonic aircraft would be retired in a decade.

5.   His work on a dart-shaped supersonic aircraft was central to development of the Concorde.

6.   The Concorde is operated only by British Airways and Air France, the two airlines whose governments financed the development of the supersonic aircraft.

7.   The swan-like supersonic aircraft crashed into a small hotel near Charles de Gaulle International Airport near Paris after one of its four engines burst into flames.

8.   The United States pumped everything in its mighty arsenal into Vietnam except nuclear weapons -- from supersonic aircraft to sophisticated technological gadgets.

9.   The United States hopes to build a fleet of supersonic aircraft known as High Speed Civil Transports, that will travel faster and higher than Concorde.

10.   While ships can now share radar data, transmission delays in conventional equipment make the information ineffective for tracking supersonic aircraft or missiles.