Jordi Munoz had no training. Scant schooling. Little money. He also had a video-game console and nothing else to do.
So he built his own drone.
A Mexican native, Mr. Munoz married an American citizen and moved to Riverside, Calif., in 2007. While waiting for his green card, the 21-year-old was marooned in his apartment, unable to work, attend school or obtain a driver’s license.
On the other hand, he had an Internet connection. A Nintendo Wii. A radio-controlled toy helicopter his mother had given him to help kill time.