<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://pop.h-cdn.co/assets/cm/15/05/320x368/54cad8b29a4cf_-_warplane-timeline-06-1211-xln.jpg>
<http://www.popularmechanics.com/military/g730/from-biplanes-to-top-gun-to-uavs-100-years-of-naval-flight/>