NASA's stuck astronauts are heading home now that a replacement crew has arrived at the International Space Station. Butch Wilmore and Suni Williams launched last June as the first test pilots for Boeing's new Starliner capsule and quickly encountered trouble. Nine months later, they're flying back on SpaceX after Starliner's empty return. Wilmore and Williams each had two space flights behind them, including monthslong stints at the space station before signing up as Starliner’s first crew. They are returning along with NASA Astronaut Nick Hague and Roscosmos cosmonaut Aleksandr Gorbunov. They are due to splash down Tuesday afternoon off the Florida coast.