Clouds Delay Last Nighttime Shuttle Launch

Clouds prevented space shuttle Endeavour from blasting off this morning on the last planned nighttime shuttle launch, delaying its trip with a final few building blocks for the International Space Station. Launch time was re-scheduled for 4:14am tomorrow. It's expected to be the last shuttle launch in darkness; only five shuttle missions remain.

"We tried really, really hard to work the weather. It was just too dynamic," launch director Mike Leinbach told the six astronauts aboard Endeavour. "We just were not comfortable with launching the space shuttle tonight." Endeavour is loaded with a new room for the ISS, as well as an observation deck that will make the orbiting complex 98% complete. (More NASA stories.)