Add Yahoo as a preferred source to see more of our stories on Google. The towering rocket NASA will use to help propel four astronauts on a historic trip around the moon is vertical on the launch pad, ...

NASA’s first crewed moon mission in decades was delayed as its engineers grapple with an all-too-familiar rocket problem: hydrogen leaks. Fixing the issue is even trickier than it may seem.

The towering rocket NASA will use to help propel four astronauts on a historic trip around the moon is vertical on the launch pad, and you can see it anytime. Watching a rocket stand static on the ...