The crew of the space shuttle Discovery is set for a second attempt to return to Earth, after bad weather forced the cancellation of Monday's scheduled landing in Florida.
NASA flight controllers said that low clouds over Florida made conditions "unstable" for Discovery's seven astronauts to make a final approach to the runway.
More cloudy weather is expected at Florida's Kennedy Space Center for Tuesday's landing -- but NASA says alternate landing sites in California and New Mexico will also be available.
The shuttle has enough supplies to stay in orbit safely until Wednesday. This will be the first space shuttle landing attempt since the shuttle Columbia disintegrated re-entering the Earth's atmosphere in 2003.