NASA hit a snag early Tuesday during a critical test of its enormous moon rocket, raising new questions about whether it will be ready to send four astronauts on a journey around the moon in less than...

NASA's first crewed moon mission in more than 50 years has been delayed until March at the earliest.

The launch team began loading the 322-foot (98-meter) rocket with super-cold hydrogen and oxygen at Kennedy Space Center late at midday.