![](https://www.nasa.gov/sites/default/files/thumbnails/image/s17-062_ssc-20170830-s00712_rs-25_engine_test.jpg)
NASA engineers closed a summer of successful hot fire testing Aug. 30 for flight controllers on RS-25 engines that will help power the new Space Launch System (SLS) rocket being built to carry astronauts to deep-space destinations, including Mars. via NASA http://ift.tt/2xyYAm6
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