www.sandboxx.us/blog/americas-military-drones-are-probably-a-lot-bigger-than-you-think/
www.airforcemag.com/raytheon-dod-needs-more-research-on-stopping-medium-size-drones/
www.theintercept.com/2016/11/20/a-new-documentary-explores-the-devastating-effects-of-drone-warfare-on-victims-and-whistleblowers/
www.pbs.org/independentlens/films/national-bird/
https://en.wikipedia.org/wiki/UAVs_in_the_U.S._military