An Atlas V rocket is set to launch from Vandenberg Air Force Base at 10:30 p.m. on Saturday night.
The rocket is carrying an NRO payload, according to the base's twitter account.
The ULA Atlas V launch carrying a NRO payload is rescheduled for Saturday, Sept. 23, from SLC-3 at Vandenberg AFB, 10:30 p.m. PDT.
— 30th Space Wing (@30thSpaceWing) September 23, 2017
The launch was originally scheduled for earlier this week, but was rescheduled for 10:30 p.m. Saturday.