<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://pop.h-cdn.co/assets/cm/15/05/768x516/54cad8b304b84_-_warplane-timeline-07-1211-xln-26265047.jpg>
<http://www.popularmechanics.com/military/g730/from-biplanes-to-top-gun-to-uavs-100-years-of-naval-flight/>