Endeavour flight watchers, including Rep. Gabrielle Giffords, were able to watch the picture-perfect NASA shuttle launch Monday for only 12 seconds because of an unusual situation.
The Sunday morning launch of space shuttle Endeavour was called off after the weather turned cloudy. NASA has rescheduled lift-off for early morning Monday.
Sensors failed to signal fuel valve’s status. But further tests may allow officials to “relax” a rule.
The space shuttle Endeavour won't launch until July, as NASA engineers try to fix a persistent leak in its external tank.