<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://pop.h-cdn.co/assets/cm/15/05/320x240/54cae77980347_-_air-launch-04-0412-de.jpg>
<http://www.popularmechanics.com/space/rockets/g789/launching-spacecraft-from-airplanes-a-brief-history/>