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Cape Canaveral, Fla. • NASA will try again Friday to send Discovery off on its final journey, after a series of postponements for the oldest and most traveled space shuttle.
Just before daybreak Thursday, mission managers called off an afternoon liftoff because of storms.
Managers planned meet again early Friday to evaluate the weather. If they feel they have a decent shot, they will give the go-ahead to fuel Discovery. Liftoff on Friday would be at 3:04 p.m.
Discovery already has been delayed by gas leaks and an electrical problem.
The mission to the International Space Station is now running four days late. It will be the final flight for Discovery, which faces a museum retirement as the shuttle program winds down.
Six veteran astronauts are assigned to the 11-day flight. They have been at Kennedy Space Center for the past week, waiting out all the delays.
NASA has until Sunday to launch Discovery, otherwise the shuttle will remain grounded until the beginning of December because of unacceptable solar angles.
It's officially NASA's next-to-last shuttle flight. Endeavour is scheduled to lift off at the end of February.