As both Atlantis and Endeavour continue to enjoy smooth flows inside their respective Orbiter Processing Facilities (OPFs), the dual processing effort in support of STS-125 and the associated Launch On Need (LON) STS-400 moves to the Vehicle Assembly Building (VAB) on Monday.
This will be marked with the rollout of STS-125’s Mobile Launch Platform (MLP) – with stacked boosters – to High Bay 3, allowing Endeavour’s boosters to be stacked in the vacated High Bay 1.