A pathfinder test article of United Launch Alliance’s (ULA) Vulcan Centaur rocket is seen at Space Launch Complex 41 at Cape Canaveral Space Force Station in Florida on Aug. 26, 2021. The pathfinder booster is undergoing a series of fueling tests to validate the infrastructure in place at the launch pad and allow the launch team to rehearse countdown operations before the Vulcan’s first flight.

A pathfinder test article of United Launch Alliance’s (ULA) Vulcan Centaur rocket is seen at Space Launch Complex 41 at Cape Canaveral Space Force Station in Florida on Aug. 26, 2021. The pathfinder booster is undergoing a series of fueling tests to validate the infrastructure in place at the launch pad and allow the launch team to rehearse countdown operations before the Vulcan’s first flight.

A pathfinder test article of United Launch Alliance’s (ULA) Vulcan Centaur rocket is seen at Space Launch Complex 41 at Cape Canaveral Space Force Station in Florida on Aug. 26, 2021. The pathfinder booster is undergoing a series of fueling tests to validate the infrastructure in place at the launch pad and allow the launch team to rehearse countdown operations before the Vulcan’s first flight.

Dream Chaser Tenacity, Sierra Space's uncrewed cargo spaceplane is lifted and moved by crane inside the Space Systems Processing Facility (SSPF) at NASA’s Kennedy Space Center in Florida on Monday, May 20, 2024. Dream Chaser Tenacity will undergo final testing and prelaunch processing inside the high bay of the SSPF ahead of its inaugural launch atop a ULA (United Launch Alliance) Vulcan rocket from nearby Cape Canaveral Space Force Station. The reusable transportation system is contracted to perform a minimum of seven cargo missions to the International Space Station as part of the agency’s efforts to expand commercial resupply services to low Earth orbit.

Dream Chaser Tenacity, Sierra Space's uncrewed cargo spaceplane is lifted and moved by crane inside the Space Systems Processing Facility (SSPF) at NASA’s Kennedy Space Center in Florida on Monday, May 20, 2024. Dream Chaser Tenacity will undergo final testing and prelaunch processing inside the high bay of the SSPF ahead of its inaugural launch atop a ULA (United Launch Alliance) Vulcan rocket from nearby Cape Canaveral Space Force Station. The reusable transportation system is contracted to perform a minimum of seven cargo missions to the International Space Station as part of the agency’s efforts to expand commercial resupply services to low Earth orbit.

Teams process Dream Chaser Tenacity, Sierra Space's uncrewed cargo spaceplane, inside the Space Systems Processing Facility (SSPF) at NASA’s Kennedy Space Center in Florida on Monday, May 20, 2024, following its arrival from the agency's Neil Armstrong Test Facility in Ohio. Dream Chaser Tenacity will undergo final testing and prelaunch processing inside the high bay of the SSPF ahead of its inaugural launch atop a ULA (United Launch Alliance) Vulcan rocket from nearby Cape Canaveral Space Force Station. The reusable transportation system is contracted to perform a minimum of seven cargo missions to the International Space Station as part of the agency’s efforts to expand commercial resupply services to low Earth orbit.

Teams process Dream Chaser Tenacity, Sierra Space's uncrewed cargo spaceplane, inside the Space Systems Processing Facility (SSPF) at NASA’s Kennedy Space Center in Florida on Monday, May 20, 2024, following its arrival from the agency's Neil Armstrong Test Facility in Ohio. Dream Chaser Tenacity will undergo final testing and prelaunch processing inside the high bay of the SSPF ahead of its inaugural launch atop a ULA (United Launch Alliance) Vulcan rocket from nearby Cape Canaveral Space Force Station. The reusable transportation system is contracted to perform a minimum of seven cargo missions to the International Space Station as part of the agency’s efforts to expand commercial resupply services to low Earth orbit.

Dream Chaser Tenacity, Sierra Space's uncrewed cargo spaceplane is processed inside the Space Systems Processing Facility (SSPF) at NASA’s Kennedy Space Center in Florida on Monday, May 20, 2024, after arriving by truck inside a climate-controlled transportation container, completing the journey from the agency's Neil Armstrong Test Facility in Ohio. Dream Chaser Tenacity will undergo final testing and prelaunch processing inside the high bay of the SSPF ahead of its inaugural launch atop a ULA (United Launch Alliance) Vulcan rocket from nearby Cape Canaveral Space Force Station. The reusable transportation system is contracted to perform a minimum of seven cargo missions to the International Space Station as part of the agency’s efforts to expand commercial resupply services to low Earth orbit.

Dream Chaser Tenacity, Sierra Space's uncrewed cargo spaceplane is processed inside the Space Systems Processing Facility (SSPF) at NASA’s Kennedy Space Center in Florida on Monday, May 20, 2024, after arriving by truck inside a climate-controlled transportation container, completing the journey from the agency's Neil Armstrong Test Facility in Ohio. Dream Chaser Tenacity will undergo final testing and prelaunch processing inside the high bay of the SSPF ahead of its inaugural launch atop a ULA (United Launch Alliance) Vulcan rocket from nearby Cape Canaveral Space Force Station. The reusable transportation system is contracted to perform a minimum of seven cargo missions to the International Space Station as part of the agency’s efforts to expand commercial resupply services to low Earth orbit.