Core Points - NASA and Boeing have agreed to reduce the number of crewed missions for the CST-100 Starliner spacecraft from 6 to 4 as part of their commercial crew transportation contract [1] - The next mission, CST-100 Starliner-1, will be an uncrewed flight aimed at delivering supplies to the International Space Station (ISS) and validating system upgrades, scheduled for as early as April 2026 [1] - NASA's Commercial Crew Program manager emphasized that the contract adjustment aligns future mission planning with the ISS's operational needs through 2030 [1] Summary by Sections Contract Adjustment - NASA and Boeing signed a commercial crew transportation contract in 2014, originally including up to 6 crewed flights [1] - The number of planned crewed missions has been officially reduced to 4 after a comprehensive review [1] Upcoming Missions - The CST-100 Starliner-1 mission will be uncrewed and is intended for cargo delivery and system validation [1] - Following the successful completion of CST-100 Starliner-1, the spacecraft is expected to conduct up to 3 crewed rotation missions [1] Testing and Future Planning - NASA and Boeing are conducting rigorous testing of the Starliner’s propulsion system in preparation for two potential flights next year [1] - The adjustment in the contract is aimed at ensuring alignment with the operational requirements of the ISS until 2030 [1]