Hydrogen valve in Discovery scrubs tonight’s launch, SpaceflightNow
“Trouble with a critical hydrogen fill-and-drain valve in the shuttle Discovery’s aft engine compartment forced NASA managers to call off an attempt to launch the orbiter early Wednesday on a space station resupply mission. It was the second delay in a row for Discovery following a weather scrub earlier Tuesday.”
Live launch webcast coverage with Miles O’Brien, Leroy Chiao, and David Waters

Biologist, Explorers Club Fellow, ex-NASA Space Biologist and Payload integrator, Editor of NASAWatch.com and Astrobiology.com, Lapsed climber, Explorer, Synaesthete, Former Challenger Center board member 🖖🏻