1.   Particular attention was paid to the O-rings, the seals between booster joints that prevent hot gases from escaping.

2.   But officials said Friday it now appears the problem can be corrected with a new technique for installing a putty-like insulation within the sealed rocket booster joints.

3.   O-ring seals in the booster nozzle joints of Atlantis and Discovery were singed by hot rocket gas earlier this summer.

4.   Cold is thought to have aggravated weaknesses in rocket booster joints in the shuttle, which exploded seconds after takeoff, killing all seven on board.

5.   Cold is thought to have aggravated weaknesses in rocket booster joints in the shuttle, which exploded seconds after takeoff, killing all seven aboard.

6.   The leak was tentatively traced to a new type of adhesive used on booster joints for both the Columbia and Atlantis.

7.   The problem was tentatively traced to a new type of adhesive used on booster joints for both the Columbia and Atlantis.