A private company will try again to test fire the main part of NASA's powerful new moon rocket.
Alliant Techsystems Inc. officials say they've identified the problem that forced them to call off a test last month with just 20 seconds until firing. The culprit was a component in the ground control unit that helps move nozzle controls, which steer a rocket in flight.
The part was replaced. A new test on the ground is set for Thursday in northern Utah.
The Ares I rocket is the centerpiece of former President George W. Bush's plan to return astronauts to the moon by 2020. But a panel of experts appointed by the White House said Tuesday there's not enough money.