The Secret Service is facing a “grave” threat to President Trump from a new wave of high-tech weapons including armed drones, plastic guns made on 3-D printers and even sophisticated IEDs, according to a new alert issued by a former agent.

“This threat is grave,” Dan Bongino told Secrets. The author of a new book on the Secret Service that calls for a seismic change of thinking at the agency, Bongino said terrorists are eager to unleash an attack on their “ultimate prize.”