Drone Aviation’s FUSE Tether System Employed by Southern Arizona Law Enforcement at First-of-its-Kind Enhanced Aerial Surveillance of High School Graduation Ceremonies JACKSONVILLE, FL and ORO VALLEY, AZ, May 30, 2018 (GLOBE NEWSWIRE) -- Drone Aviation Holding Corp. (OTCQB: DRNE) (“Drone Aviation” or the “Company”), a manufacturer of tethered drones and...