NASA has successfully test-fired the engine for the most powerful rocket ever

NASA has successfully tested the engine that will power its new, massive Space Launch System (SLS) deep-space rocket, reporting no issues across the 7.5-minute duration.
Read more: http://www.sciencealert.com/nasa-has-successfully-test-fired-the-engine-for-the-most-powerful-rocket-ever?source=Snapzu