1.   Glenn will also join his crewmates in eight other experiments that have been conducted on previous shuttle astronauts.

2.   Investigators looked at samples of insulation from booster nozzles used on previous shuttle missions as well as insulation from unused nozzles.

3.   Marine Corps Maj. Frederick W. Sturckow, who flew on one previous shuttle mission, will serve as pilot and second in command.

4.   Most significant was the discovery in late July that O-ring seals in the solid rocket booster nozzles had sustained slight burn damage during two previous shuttle flights.

5.   On this mission, Discovery will carry a primary crew of four, commanded by Air Force Col. Scott J. Horowitz, a veteran of three previous shuttle flights.

6.   Previous shuttle missions have featured multiple deployments or retrievals but never a multiple combination.

7.   Previous shuttle rendezvous operations have always had use of the radar.

8.   Scobee, Resnick, McNair and Onizuka had all flown on previous shuttle flights.

9.   The Columbia is under the command of Lt. Col. James D. Halsell of the Air Force, a veteran of two previous shuttle flights.

10.   As on most previous shuttles, Christopher had skipped Lebanon.