One of the four RS-25 engines now being bolted into the core stage of NASA’s next moon rocket is not new hardware at all.
From stray pens to birds, Mike Leinbach, retired launch director, explains why shuttle launches sometimes got scrubbed.
A few months are left until the third mission of the Artemis program, and the second crewed one, will lift off. Not meant to travel to the Moon, but merely to stay in close proximity to Earth to test ...