NASA Fishes For Tools to Tackle Asteroid

"NASA may have retired its shuttles, but it has its sights on sending astronauts deeper into space than ever before."

"These voyages are years away but on Monday, astronauts are heading underwater to take part in a simulation that will help them figure out how they might explore one possible new destination: A near-Earth asteroid."

"Astronaut Dottie Metcalf-Lindenburger flew on one of the last space shuttle missions. She even helped prepare Atlantis for its final launch."

"'It was a very bitter sweet time,' says Metcalf-Lindenburger, who really wants to get to space again. But in the meantime, she's commanding a four-person crew that's putting on scuba gear instead of space suits."