Who Will Get To Mars First?

http://www.slate.com/blogs/bad_astronomy/2015/04/16/elon_musk_and_mars_spacex_ceo_and_our_multi_planet_species.html

http://www.forbes.com/sites/ericmack/2015/04/16/nasa-is-all-about-sending-humans-to-mars-before-anyone-else/