The #AtlasV first stage is being secured to the Mobile Launch Platform inside the Vertical Integration Facility to complete Launch Vehicle on Stand (LVOS) day for #Mars2020. The four SRBs and Centaur upper stage will be added in the days ahead. https://t.co/iq4oKMrMuA pic.twitter.com/zOmQ5aVAxB

— ULA (@ulalaunch) May 28, 2020