NASA may have two astronauts make repairs on the shuttle Discovery's belly.
The problem is a couple of short strips of dangling fabric. The glitch apparently resulted from accidental slippage of ceramic-fiber cloth used to fill the thin gaps between thermal tiles that deflect heat.
Some engineers worry the problem could trigger potentially treacherous overheating during re-entry.
No decision has been made on a possible repair. It will be Monday before analysis is complete and mission managers decide whether to have the crew's two spacewalkers cut or pull the two hanging strips.