WATCH: NASA Test-Fires Colossal Rocket Engines for Mars Mission
![WATCH: NASA Test-Fires Colossal Rocket Engines for Mars Mission](https://cdn1.img.sputniknews.com/images/104453/45/1044534562.jpg)
The United States’ National Aeronautics and Space Administration has released video of a successful test firing of an upgraded version of the RS-25 rocket engine the agency will use to hurl its Space Launch System (SLS), a rocket the size of the Statue of Liberty, to the Red Planet.