"Final Launch: Delta IV Heavy's Last Liftoff from Space Coast"
United Launch Alliance is set to launch the final Delta IV rocket on Thursday with the NROL-70 mission for the National Reconnaissance Office, marking the 45th and last flight of the Delta IV. The mission, expected to take several hours to complete, will carry a classified electronic signals intelligence satellite to geostationary orbit. This launch signifies the retirement of the Delta IV after 22 years of service, leaving United Launch Alliance with its Atlas V and next-generation Vulcan rocket to continue carrying out US military launch requirements.