'Zero hour' for NASA Artemis 1 moon mission launch on Aug. 29

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CAPE CANAVERAL, Fla. — It’s make or break time for NASA’s new moon rocket. 

With 8.8 million pounds of thrust, the rocket — called the Space Launch System (SLS) — is designed to be mightier than NASA’s mighty Saturn V. Its Orion space capsule outsizes its Apollo ancestor by one-third. Yet neither spacecraft has passed the ultimate test: a trip to the moon and back.