NASA vs SpaceX

https://en.wikipedia.org/wiki/SpaceX
https://en.wikipedia.org/wiki/List_of_government_space_agencies
https://www.wired.com/2017/02/spacex-plans-launch-humans-around-moon-2018/
https://www.nasa.gov/mission_pages/shuttle/sts1/gagarin_anniversary.html
https://www.nasa.gov/mission_pages/shuttle/sts1/gagarin_anniversary.html
https://www.wired.com/2011/04/0412soviet-cosmonaut-yuri-gagarin-orbits/
https://www.space.com/1616-making-history-china-human-spaceflight.html
https://history.nasa.gov/
http://www.history.com/this-day-in-history/president-eisenhower-authorizes-creation-of-nasa
https://www.hq.nasa.gov/office/pao/History/spaceact.html
https://www.theverge.com/2017/2/28/14756488/spacex-vs-nasa-new-space-race-moon-travel-tourism
https://www.space.com/34365-mars-missions-by-nasa-spacex-and-more.html
https://www.nasa.gov/content/journey-to-mars-overview
https://www.space.com/34365-mars-missions-by-nasa-spacex-and-more.html
https://www.crunchbase.com/organization/space-exploration-technologies#/entity
https://www.fool.com/investing/2016/06/25/how-does-spacex-make-money.aspx
https://www.nasa.gov/content/reach-for-new-heights-nasa-budget-unveiled-for-fiscal-year-2016
http://spacexstats.xyz/#LaunchCount
https://en.wikipedia.org/wiki/List_of_Space_Shuttle_missions
https://www.nasa.gov/audience/forstudents/k-4/stories/nasa-knows/what-is-the-soyuz-spacecraft-k-4
http://newatlas.com/nasa-orion-em-one/48114/
https://www.forbes.com/sites/quora/2017/05/11/what-are-the-differences-between-an-astronaut-and-a-cosmonaut/#53b9b39d3fa7
http://www.spacex.com/missions
http://www.spacex.com/crew-dragon
http://www.spacex.com/falcon9
https://www.nasa.gov/about/whats_next.html
https://www.nasa.gov/press-release/nasas-three-billion-mile-journey-to-pluto-reaches-historic-encounter
https://www.theverge.com/2017/2/28/14756488/spacex-vs-nasa-new-space-race-moon-travel-tourism
https://www.theverge.com/2016/11/9/13574194/nasa-earth-science-trump-presidency-space-policy-private-partnerships