text:  Cities across the U.S. are turning to drones rather than fireworks for some Fourth of July celebrations this year. As NPR's Netta Ulby reports, drone shows are scheduled to light up the skies tonight in Denver, San Antonio, and Salt Lake City, among others. A drone show in downtown Los Angeles last year replaced what had been known as the West Coast's biggest fireworks display. Instead, hundreds of dancing lights, all synced to music, floated into the shapes of breakdancers and clapping hands in the evening sky.