United Launch Alliance’s Delta IV Heavy rocket will try again on Wednesday to launch the mysterious NROL-71 mission for the National Reconnaissance Office. The initial attempt was scrubbed after ULA noted an issue with the hold-fire circuitry – specifically a redundant communication link between the control center and the launch site – required further work. Following a 24 hour recycle, all was proceeding to plan until T-7 seconds when an abort was trigged. Another attempt on Tuesday was scrubbed due to high ground winds, moving the launch to Wednesday.
