Drone surveillance of sensitive US military sites raises alarm. Drones seen flying over Virginia, Nevada military bases in past year: WSJ. Drones spotted over secret base of US Navy's elite SEAL Team Six. Drones were spotted over Naval Station Norfolk, world's largest naval port. Pentagon struggling to respond to mysterious drones. Drones first sighted in Dec 2023 over Langley Air Force Base in Virginia. Dozens of drones seen flying at night over base home to F-22 Raptors.