The U.S. has microwave weapons that proponents believe could stop North Korea from launching missiles by frying their electronics.
The weapons were discussed at an August White House meeting related to North Korea, two U.S. officials with direct knowledge told NBC News.
The microwave weapons, known as CHAMPs, are fitted into an air-launched cruise missile and delivered from B-52 bombers. With a range of 700 miles, they can fly into enemy airspace at low altitude and emit sharp pulses of microwave energy to disable electronic systems.
"These high-powered microwave signals are very effective at disrupting and possibly disabling electronic circuits," Mary Lou Robinson, who heads development of the weapons at the Air Force Research Laboratory in Albuquerque, told NBC News.