Fireworks are fading, but their high-tech replacement comes with new risks

Drone shows are rapidly replacing fireworks at concerts, sporting events and Fourth of July celebrations as communities embrace what many see as a safer, more environmentally friendly alternative. However, as the skies become more crowded with drones, security experts say the increasingly crowded airspace around large public events can make it more difficult to detect potentially bad actors.

R2 Wireless CEO of U.S. Operations Cordell Bennigson, who is a retired Marine Corps officer, told...