From the AP – Clouds prevented space shuttle Endeavour from blasting off Sunday on the last planned nighttime shuttle launch, delaying its trip with a final few building blocks for the International Space Station. Endeavour is loaded with a new room for the space station, as well as an observation deck. Once both of those are installed, the orbiting complex will be 98 percent complete.

The band of low clouds started moving in from the north late Saturday. NASA counted down to the nine-minute mark, but the sky remained overcast. NASA managers said they would try again Monday, when slightly better conditions were expected. Launch time on Monday is scheduled at 4:14 a.m. It’s expected to be the last shuttle launch in darkness.