-- NASA says remains of some of the seven Columbia astronauts have been recovered. Bob Cabana, director of flight crew operations, says they're still identifying them.
Experts say they don't expect identification to be a problem, but details about exactly how the crew members died and how quickly could be elusive.
Along with D-N-A, teams can use fingerprints, dental records and X-rays to identify partial remains. Forensic experts are less certain about handling problems presented by the toxic fuel and chemicals used throughout the space shuttle.
The shuttle crew's remains are expected to be analyzed at the same center that identified the remains of the Challenger astronauts and the Pentagon victims of nine-eleven. It's at Dover Air Force Base in Delaware.