July 27, 2021

Live coverage: Delta 4-Heavy countdown halted in final seconds


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Live coverage of the countdown and launch of a Delta 4-Heavy rocket with the classified NROL-44 payload for the National Reconnaissance Office. Text updates will appear automatically below. Follow us on Twitter.

United Launch Alliance’s live launch broadcast begins at 11:34 p.m. EDT on Wednesday, Sept. 30 (0334 GMT on Oct. 1).


If you would like to see more articles like this please support our coverage of the space program by becoming a Spaceflight Now Member. If everyone who enjoys our website helps fund it, we can expand and improve our coverage further.
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