Workers attach a crane to the first Northrop Grumman aft exit cone to arrive for the Space Launch System’s solid rocket boosters inside the Rotation, Processing and Surge Facility at NASA’s Kennedy Space Center in Florida on Nov. 4, 2019. The aft exit cone was shipped from Promontory, Utah. It will be checked out and prepared for the Artemis I uncrewed test flight. The aft exit cones sit at the bottommost part of the twin boosters. They are attached to the aft skirts, which contain the booster separation motors. The exit cones help to protect the aft skirts during launch.