CAPE CANAVERAL, Fla. (AP) - A potentially-dangerous gas leak has forced another delay in the final launch of Discovery.
The hydrogen leak popped up as NASA fueled the space shuttle for a planned afternoon liftoff. It means means no further launch attempts until at least Monday. And the shuttle launch director says even that may be too much to hope for.
This is the latest -- and most serious -- problem to hit NASA's oldest and most-traveled shuttle in the past week.
A less serious version of the same leak affected two shuttle missions last year. Both times, it took four days to fix. Monday is only three days away. After that, NASA's launch window to the International Space Station closes until the end of the month.