Theories about why upgraded RS-68A's were needed for N.R.O. [National Reconnaissance Office]'s NROL-15 Delta IV Heavy launch. The most probable is the launch of a third Misty "stealth" spy satellite into a secret orbit.
June 27 at 7:29pm
Rod Doty
Textbook launch.. well done!
Congrats to the ULA and NRO teams!