<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://pop.h-cdn.co/assets/cm/15/05/480x360/54cae778e1ed8_-_air-launch-02-0412-lgn.jpg>
<http://www.popularmechanics.com/space/rockets/g789/launching-spacecraft-from-airplanes-a-brief-history/>