United Launch Alliance rolled its Atlas 5 551 rocket to the launchpad at Space Launch Complex 41 (SLC-41) on Saturday, July 27, 2024, ahead of the USSF-51 launch on Tuesday, July 30. Image: Will Robinson-Smith/Spaceflight Now
United Launch Alliance is preparing for a seminole moment for its Atlas 5 rocket. The launch vehicle is preparing to launch its 58th and final national security mission on Tuesday. The United States Space Force-51 (USSF-51) mission will also be the 100th national security mission launch for ULA.