The Space Launch System (SLS) rocket’s liquid oxygen tank structural test article was manufactured and stacked in June 2019 at NASA’s Michoud Assembly Facility in New Orleans. To construct the test article, Boeing technicians at Michoud moved the liquid oxygen tank to the Vertical Assemby Building stacking and integration area. Here, they added simulators to mimic the two structures that connect to the tank, the intertank and the forward skirt. This structural hardware for the SLS core stage for America’s new deep space rocket is structurally identical to the flight version of the tank. It will be shipped on the Pegasus barge to NASA’s Marshall Space Flight Center in Hunstville, Alabama, where it will undergo a series of tests that simulate the stresses and loads of liftoff and flight. These tests will help ensure designs are adequate for successful SLS missions to the Moon and beyond. The flight liquid oxygen tank along with the liquid hydrogen tank supplies more than 500,000 gallons ...