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NASA’s Giant SLS Rocket Is One Step Closer to Launch

NASA’s Giant SLS Rocket Is One Step Closer to Launch

[html]After three aborted attempts, engineers successfully co*pleted a practice countdown that included filling the tanks with liquid oxygen and hydrogen.[/html]

Source: NASA’s Giant SLS Rocket Is One Step Closer to Launch (http://ht**://www.wired.c**/story/nasas-giant-sls-rocket-is-one-step-closer-to-launch/)