After weeks of denial, NASA had to come back to Earth, or, rather, space: Two American astronauts, Barry Wilmore and Sunita Williams, are stranded in space on the International Space Station (ISS). The Boeing Starliner capsule, which sent them into orbit at the beginning of June, is currently unable to return them safely to Earth. The American agency could therefore call on Elon Musk and his company SpaceX, which isn't due to arrive at the ISS before February 2025.