NASA will begin the countdown for launch of Space Shuttle Columbia on mission STS-109 Feb. 25 at 10 a.m. EST at the T-43 hour mark. This mission marks the fourth Shuttle servicing mission to the ...
NASA will begin the launch countdown for Space Shuttle Atlantis’ STS-115 mission at 6 p.m. EDT Thursday, Aug. 24, at the T-43 hour point. During this mission, Atlantis’ crew will resume construction ...
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