USATODAY.com - Why the U.S. should return to the moon and venture on to Mars

USATODAY.com - Why the U.S. should return to the moon and venture on to Mars: "Why the U.S. should return to the moon and venture on to Mars
Michael Griffin took over as NASA administrator earlier this year, at a time when the space agency faces perhaps its greatest challenges in decades. Among them: steering President Bush's proposal for manned missions to the moon and, eventually, Mars; fulfilling the U.S. obligation to the International Space Station; fixing safety problems with the space shuttle and developing the next generation of spacecraft to replace the shuttle. Griffin discussed these and other issues recently with USA TODAY editors and reporters. His comments were edited for length and clarity."