countdown To Moon Begins

NASA began the countdown Monday for humanity's first launch to the moon in 53 years. The 32-story Space Launch System rocket is poised to blast off Wednesday evening with four astronauts. After a day in orbit around Earth, their Orion capsule will propel them to the moon and back. There are no stops — just a quick U-turn around the moon. The nearly 10-day flight will end with a splashdown in the Pacific. NASA's Artemis II mission should have soared in February, but was grounded by hydrogen fuel leaks. The leaks were fixed, but then a helium pressurization line became clogged, forcing a return to the hangar late last month. The rocket returned to the pad 1 1/2 weeks ago, and its US-Canadian crew arrived at the launch site on Friday.