By SETH BORENSTEIN
AP Science Writer
CAPE CANAVERAL, Fla. – Landing a man on the moon was a towering achievement. Now the president has given NASA an even harder job, one with a certain Hollywood quality: sending astronauts to an asteroid, a giant speeding rock, just 15 years from now.
Space experts say such a voyage could take several months longer than a journey to the moon and entail far greater dangers.
“It is really the hardest thing we can do,” NASA Administrator Charles Bolden said.