This is so awesome! First we went to the moon and now we are doing test fires to go to Mars. I have heard this may happening since I was a teenager. Maybe it will come true before long.
NASA has successfully tested their first RS-25 rocket engine for the 
agency’s next heavy lift rocket, the Space Launch System (SLS), for 500 seconds. The..
Source: NASA performs first test fire of rocket engine designed to send humans to Mars
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