space108:
If you guys very smart, please start work harder, and then you will become an astronout,if you want it.
![photos-of-space:
“A 750,000 pound motor is test-fired at Marshall Space Flight Center (MSFC) for the U.S. Air Force Expendable Launch Vehicle (ELV) project [3000 x 2207]
”](https://66.media.tumblr.com/94f7ab18b2d057ffd81fb0fc395348f8/tumblr_pa04u2hTbc1ve10t6o1_1280.jpg)
