Wondering why you don't see drones everywhere, despite the intention of Amazon and others to deliver all the things with flying robots? Here's why: It's illegal. The United States Federal Aviation Administration (FAA) doesn't permit filming, crop-spraying, spying, tour-guiding, pizza delivery or any other commercial drone applications (you can, however, fly one privately). "But that's unjust!" you may rail. "Why should the government stop businesses from plying their trades?" The FAA is charged with keeping the skies safe, and drone operators could pose a danger to commercial aircraft or spy on you illegally. On the other hand, US businesses want the FAA to approve drone use stat, so they can stop operating quasi-illegally and start making money. So, who's right? Who's wrong? Here are the ABCs of commercial drone flight in the US. WHAT ARE THEY? First, a little terminology. The industry would prefer Unmanned Aerial Vehicle (UAV), ...