Space.com #NASA Test-Fires Engine for Most Powerful Rocket Ever 19 August 2016 fborgosano Leave a comment Share: NASA engineers blasted an RS-25 rocket engine for 7 minutes yesterday (Aug. 18) at the Stennis Space Center in Mississippi as part of a development test for hardware that will make up the most powerful rocket ever. from Space.com ift.tt/2bAatgw Share: