Discovery Launch Called Off

Today's launch of the space shuttle "Discovery" has been scrubbed.

The launch was called off because of a faulty fuel-tank sensor. Discovery was supposed to take off for the first shuttle flight since the "Columbia" disaster of two and a-half years ago.

There's no word yet on a new launch date for Discovery.

The crew of seven was already on board when the launch was scrubbed. NASA had earlier said everything appeared to be going well, but that the weather was a concern -- with a 60 percent chance that storms could cause a delay.