SpaceX’s Falcon 9 rocket has been grounded for the third time in three months after a booster landed incorrectly during a mission to rescue two astronauts stranded by Boeing’s Starliner. The Crew-9 mission successfully reached the ISS, but the Falcon 9’s second-stage booster experienced an “off-nominal deorbit burn.” The FAA is investigating, with no public injuries or property damage reported. Previous groundings occurred in July and August due to booster issues. SpaceX and Elon Musk have criticized the FAA for delays and alleged favoritism towards Boeing.