As of January 2022[update], the Space Launch System (SLS) – a Shuttle-derived, super heavy-lift expendable launch vehicle – has conducted one successful launch, and a further four have been officially scheduled.[1] All flights on the current launch manifest are for the Artemis program, a human spaceflight project aimed at establishing a permanent human presence on the Moon. The flights will launch from the vehicle's dedicated pad at Kennedy Space Center's Launch Complex 39B (LC-39B). The first three flights use the Block 1 configuration with a modified Delta Cryogenic Second Stage known as the Interim Cryogenic Propulsion Stage (ICPS). The Block 1B configuration with the Exploration Upper Stage (EUS) will be used starting from the fourth flight.[2]