February 21, 2026 update: After completing a second Wet Dress Rehearsal, where no leaks were detected, teams attempting to re-pressurize SLS were unable to get helium flow through to the vehicle. A similar issue occurred ahead of the launch of Artemis I back in 2022. This will result in NASA having to roll SLS back to the VAB to work on this fix. Due to having to roll back, the entire March launch window is off the table. See below for available launch dates in April.
