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CAPE CANAVERAL, Fla. — NASA called off the launch of space shuttle Discovery for a second time Tuesday after a crucial fuel valve failed to work properly.
Officials halted the countdown midway through the fueling process. The seven astronauts had not boarded for today’s scheduled flight to the international space station.
“Drats!” said astronaut Jose Hernandez in a Twitter update.
Another attempt will not be made until Friday at the earliest.
