<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://pop.h-cdn.co/assets/cm/15/05/480x360/54caf77d365ff_-_stealth-threats-01-1012-de.jpg>
<http://www.popularmechanics.com/military/g945/the-emerging-threats-to-us-stealth-jets/>