Rockets

Rocket Engines

https://www.youtube.com/watch?v=PzHaWc5n70A https://www.youtube.com/watch?v=4HjEqz-zPag

Elon Musk http://www.theguardian.com/technology/2013/jul/17/elon-musk-mission-mars-spacex

http://jalopnik.com/what-nasa-isnt-saying-in-nasas-big-rocket-announcement-1627900569

http://www.extremetech.com/extreme/188866-nasas-space-launch-system-is-officially-all-systems-go-for-mars-and-moon-landings

http://www.nasa.gov/exploration/systems/sls/index.html#.VASwwqNeLQo

http://www.space.com/12957-nasa-giant-rocket-space-launch-system-infographic.html

http://www.nasaspaceflight.com/2014/08/battle-heavyweight-rockets-sls-exploration-rival/