May 16, 2022

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

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).

Spaceflight Now