NASA's Boeing Crew Flight Test astronauts Suni Williams and Butch Wilmore exit the Neil A. Armstrong Operations and Checkout Building at the agency's Kennedy Space Center in Florida during a mission dress rehearsal on Friday, April 26, 2024. The first flight of Boeing’s Starliner capsule with a crew on board is scheduled for Monday, May 6, 2024. (Frank Micheaux/NASA via AP)
Boeing Crew Flight Test crew members Suni Williams and Butch Wilmore work in the Boeing Starliner simulator at the Johnson Space Center in Houston on Nov. 3, 2022. The first flight of Boeing’s Starliner capsule with a crew on board is scheduled for Monday, May 6, 2024. (NASA/Robert Markowitz)
Boeing's Starliner capsule atop an Atlas V rocket is rolled out to the launch pad at Space Launch Complex 41, Saturday, May 4, 2024, in Cape Canaveral, Fla. NASA astronauts Butch Wilmore and Suni Williams will launch aboard to the International Space Station, scheduled for liftoff on May 6, 2024. (AP Photo/Terry Renna)
Boeing's Starliner capsule atop an Atlas V rocket is rolled out to the launch pad at Space Launch Complex 41, Saturday, May 4, 2024, in Cape Canaveral, Fla. NASA astronauts Butch Wilmore and Suni Williams will launch aboard to the International Space Station, scheduled for liftoff on May 6, 2024. (AP Photo/Terry Renna)
Boeing's Starliner capsule atop an Atlas V rocket is rolled out to the launch pad at Space Launch Complex 41, Saturday, May 4, 2024, in Cape Canaveral, Fla. NASA astronauts Butch Wilmore and Suni Williams will launch aboard to the International Space Station, scheduled for liftoff on May 6, 2024. (AP Photo/Terry Renna)