2017 = four successful launches for NRO! And we're looking forward to 2018 when we will launch #NROL47 onboard a @ulalaunch #DeltaIV rocket from VAFB. #NROL47 will take place no earlier than Jan. 10, so check back w/ us and ULA for more details in the coming weeks.

— NRO (@NatReconOfc) December 7, 2017