Chennai, Mar 19 (UNI) The National Aeronautics and Space Administration''s (NASA)’s SpaceX Crew-9, comprising India born Woman Astronaut Sunita Williams and three others, completed the agency’s ninth commercial crew rotation mission to the International Space Station (ISS), splashing down safely in a SpaceX Dragon spacecraft off the coast of Tallahassee, Florida, in the Gulf of America on early Wednesday morning at 0327 hrs (IST).