Roman Mission Dress Rehearsal, Hangar X and AE

From left, Gabriel Fernandez and Payton Wolff, program specialists with the Launch Services Program at NASA’s Kennedy Space Center, along with mission managers for NASA’s Nancy Grace Roman Space Telescope participate in a mission dress rehearsal on Thursday, Aug. 20, 2026, inside SpaceX’s Hangar X at NASA Kennedy in Florida. Teams ran through a full end-to-end simulation of every major step they will experience on launch day except liftoff, including powering up the spacecraft, fueling the rocket, conducting weather briefings, and other operations.