Mark your calendars! An RS-25 engine fire up is scheduled for this Thursday, August 13. The test will be carried live on NASA TV beginning at 3:30 PM CDT / 4:30 EST / 20:30 UTC and will be streamed at nasa.gov/nasatv. Please make plans to watch and hear the rumble as NASA continues on its Journey to Mars. Pictured here, a test firing of a space shuttle main engine in the A-1 Test Stand. Credit: NASA / c. 2007 #SLSFiredUp #JourneyToMars #NASA #progress #enginetesting #rocketscience #smokeandfire #heritage #nasahistory #mississippi #madeinusa nasastennis nasa_marshall nasa