United Launch Alliance is set to kick off its 2018 launch campaign with a Delta 4 rocket flight Thursday from Vandenberg Air Force Base in California. Gusty winds prevented rollback of the launch pad’s mobile gantry in preparation for fueling Wednesday, forcing a 24-hour delay. Liftoff of the the Delta 4 from Space Launch Complex-6 is scheduled for a window opening at 1 p.m. PST (4 p.m. EST; 2100 GMT) Thursday with a top secret spy satellite for the National Reconnaissance Office.
[link to spaceflightnow.com (secure)]

Live coverage: ULA counting down to its first launch of 2018
[link to spaceflightnow.com (secure)]