1.   Battered by the turbulence, the shuttle is damaged, depleting the supply of oxygen.

2.   After a weekend assessment, mission managers concluded the protrusion will not damage the shuttle.

3.   NASA feared the equipment would blow away at liftoff and possibly damage the shuttle.

4.   Worried that the pin could damage the shuttle at lift-off, mission managers stopped the countdown.

5.   Any falling chunks could damage the shuttle during liftoff.

6.   Chunks of ice could break off during liftoff and damage the shuttle.

7.   Engineers feared the pin could blow into Discovery during liftoff and possibly damage the shuttle.

8.   Such ice could break off during liftoff and damage the shuttle.