The International Space Station (ISS) returned to full strength on Saturday with the arrival of four new astronauts. They replaced colleagues forced to leave early because of health problems. SpaceX launched the astronauts from Cape Canaveral and docked them to the ISS a day later. This follows NASA's first-ever medical evacuation in 65 years of human spaceflight. One astronaut launched last summer had a serious health issue, forcing a quick return to Earth on January 7. This left only three crew members aboard—one American and two Russians. NASA paused spacewalks and cut down on research because of the small crew. The new team includes NASA’s Jessica Meir and Jack Hathaway, France’s Sophie Adenot, and Russia’s Andrei Fedyaev. Meir, a marine biologist, and Fedyaev, a former military pilot, have been to the ISS before. Meir took part in the first all-woman spacewalk in 2019. Adenot, a military helicopter pilot, is only the second French woman in space. Hathaway is a US Navy captain. Upon docking 466 km above Earth, Adenot cheerfully said, “Bonjour!” The seven astronauts hugged and gave high-fives as the hatches opened. Meir said, “Let’s get rolling.” NASA keeps the sick astronaut’s identity and illness private. The four astronauts returned to Earth more than a month early. They spent a night in a hospital before heading back to Houston. NASA reported no changes in medical checks for the new crew.