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NASA Fully Fuels SLS Moon Rocket 1st Time During 4th Practice WDR Countdown Tanking Test: Photos

For SpaceUpClose.com & RocketSTEM KENNEDY SPACE CENTER, FL – For the first time NASA was able to fully fuel both stages of the agency’s Mega Moon Rocket with supercold cryogenic propellants and enter the terminal countdown to within 29 seconds of T-Zero on Monday June 20, despite a hydrogen leak during the fourth attempt to complete the critical countdown and