#VulcanRocket goes to work for the nation tonight by launching its first mission for @SpaceForceDOD and @USSF_SSC. United Launch Alliance has initiated the countdown at Cape Canaveral for liftoff of the #USSF106 mission during a launch window of 7:59 to 8:59 p.m. EDT (2359-0059 https://t.co/LjkqG4whQU