Barges are docked at the B-2 Test Stand at Stennis Space Center near Bay St. Louis, Mississippi, during preparations for a wet dress rehearsal exercise with the core stage of NASA’s Space Launch System rocket. During the wet dress rehearsal, operators will fully load the core stage’s propellant tanks for the first time and countdown just shy of engine ignition. The wet dress rehearsal is the seventh in a series of eight Green Run tests of the core stage’s integrated systems prior to its transport to Kennedy Space Center and launch on the Artemis I mission.