NASA cleared its moon rocket on Thursday for an April launch with four astronauts after completing the latest round of repairs. The 322-foot (98-meter) rocket will roll out of the hangar and back to the pad next week at Florida's Kennedy Space Center,

"We reviewed the challenges that we've had and how we've addressed them. And we talked about the work that remains, what's left to do and how we're going to get through all of that," said Lori Glaze, ...