The U.S. has deployed drones, U-2s and a special nuclear "sniffer" plane that can detect evidence of a nuclear explosion, say officials.
William M. Arkin and Ken Dilanian and Robert Windrem and Courtney Kube, NBC News: World
Thu, 04/20/2017 - 4:07pm
The U.S. has deployed drones, U-2s and a special nuclear "sniffer" plane that can detect evidence of a nuclear explosion, say officials.