By a staff reporter: NASA’s SpaceX Crew-2 astronauts safely splashed down in the Gulf of Mexico off the coast of Florida Monday aboard the Crew Dragon Endeavour spacecraft, completing the agency’s second long-duration commercial crew mission to the International Space Station. The mission set a record for the longest spaceflight by a U.S. crewed spacecraft. The international crew of four spent 199 days in orbit, surpassing the 168 days set by NASA’s SpaceX Crew-1 mission earlier this year.