The National Aeronautics and Space Administration's (NASA) Human Exploration and Operations (HEO) Mission Directorate oversees human spaceflight programs including Orion, the Space Launch System (SLS), and Commercial Crew vehicles. HEO supports research and development for human exploration through programs like the Human Research Program and Advanced Exploration Systems. The directorate also provides space and flight support for critical technology projects at centers like Goddard Space Flight Center.