11.   Booster nozzles will be removed this weekend and sent by truck to manufacturer Thiokol Corp. in Utah for inspection.

12.   Hot gas from burning rocket fuel singed primary O-rings in the booster nozzles of Atlantis and Discovery in late June and July.

13.   Shuttle officials insist the singed O-rings in the booster nozzles of Atlantis and Discovery in June and July caused no added danger to the two crews.

14.   This time, the seal on the right booster nozzle was singed slightly, with three tiny marks.

15.   O-rings in the booster nozzles of the Atlantis and Discovery were damaged in late June and July by hot gas from burning rocket fuel.

16.   The actual O-ring is found in the booster nozzle, a steel, aluminum, and composite bell-shaped apparatus from which thrust emerges as fuel is burned.