NASA called off the launch of the space shuttle Discovery for a second time Tuesday after a critical fuel valve failed to work properly. Launch officials halted the countdown midway through the ...

CAPE CANAVERAL -- Discovery and seven astronauts will remain grounded until at least Friday so technicians can test a faulty propulsion system valve that failed as the shuttle was being fueled Tuesday ...

Thisstory was updated at 7:00 p.m. EDT. CAPECANAVERAL, Fla. - A broken valve on the space shuttle Discovery forced NASA tocall off the spacecraft?s second launch attempt in a row late Tuesday ...

Thisstory was updated at 1:04 a.m. EST. NASAdelayed the planned February launch of the shuttle Discovery for the fourthtime late Friday, leaving the space station-bound construction flight in limboas ...

NASA on Tuesday delayed next week's launch of space shuttle Discovery while it runs tests to determine whether newly installed valves would cause serious damage if they broke during liftoff. The ...