NASA muscled through familiar headaches Monday at Kennedy Space Center during a critical tanking test dealing with liquid hydrogen leaks at the launch pad for the Artemis II moon mission that could fl...

As NASA completes final preparations for the Artemis II mission, including a critical 'wet dress rehearsal,' former astronaut Leroy Chiao spoke with NBC News' Brian Cheung about the anticipated missio...

The full wet dress rehearsal is a complete countdown simulation -- the wet dress countdown started Sunday at minus-39 hours and 30 minutes -- and will end with a simulated launch window on Monday arou...