Live coverage of the United Launch Alliance Atlas 5 rocket flight to deploy the NROL-42 payload for the National Reconnaissance Office.
(Launch webcast begins at 10:10 p.m. local / 1:10 a.m. EDT / 0510 GMT)
Entries below listed as EDT (subtract 3 hours for local time; add 4 hours for GMT)
Delta 4
Live coverage: Delta 4-Heavy launches from Vandenberg Air Force Base
United Launch Alliance’s Delta 4-Heavy rocket lifted off at 11:10 a.m. PST (2:10 p.m. EST; 1910 GMT) Saturday from Vandenberg Air Force Base, California, after a month-long delay to troubleshoot a hydrogen leak in one of its boosters. The heavy-lifter was on a mission to send a U.S. government spy satellite into orbit.
Delta 4
Live coverage: Delta 4-Heavy countdown halted in final seconds
United Launch Alliance scrubbed the launch of a Delta 4-Heavy rocket Wednesday night less than 10 seconds before liftoff from Cape Canaveral, the second such abort suffered by this mission.. The launch of a classified National Reconnaissance Office spy satellite is expected to be delayed at least several more days as engineers assess the cause of Wednesday’s last-minute abort.