The Associated Press reported this morning:

CAPE CANAVERAL, Fla. — NASA called off the launch of space shuttle Discovery for a second time yesterday after a critical fuel valve failed to work properly.

Launch officials halted the countdown midway through the fueling process.  The seven astronauts had not yet boarded the shuttle for today’s scheduled early-morning flight to the international space station.

“Drats!” said astronaut Jose Hernandez in a Twitter update.

Drats indeed.  Toto, we’re not in 1969 anymore.