Sierra Space Dream Chaser 'mini shuttle' space plane tests continue toward May maiden flight
Sierra Space officials announced the autonomous spacecraft successfully completed and passed testing milestones in ...
WMAZ13d
NASA Challenger explosion remembered 39 years later
WASHINGTON — It's been 39 years since the Challenger space shuttle explosion, one of NASA's most devastating tragedies. NASA's Challenger shuttle exploded 73 seconds after lifting off on Jan. 28 ...