드론의 개발과 가능성

NOVA. "Sperry Aerial Torpedo (USA)".
John H. Lienhard. "KETTERING'S BUZZ BOMB". Boss Ket's pilotless 'buzz-bomb'. Automotive News, GM 75th Anniversary Issue, Sept. 16, 1983.
http://inside.chosun.com/site/data/html_dir/2014/03/06/2014030601194.html.
http://blogs.reuters.com/data-dive/files/2015/01/DroneStrikes013015.jpg.
http://smartplanes.se/#application.