US Launches Largest Rocket, Spy Satellite
Delta IV is essentially a spy satellite
By Newsy, a Newser Video Partner
Posted Aug 29, 2013 12:57 PM CDT

(Newser) – The United States launched its largest rocket ever into space yesterday carrying a top-secret payload. The Delta IV Heavy unmanned rocket took off from California’s Vandenberg Air Force base as part of a mission for the National Reconnaissance Office. It's essentially a spy satellite.