SpaceX launched back into Falcon 9 action despite an ongoing FAA investigation into why a recent rocket landing attempt failed.

SpaceX launched two Falcon 9 rockets in just over an hour early Saturday (Aug. 31) and nailed back-to-back booster landings three days after a recent failure.

The two Falcon 9 launches — which lifted off from Florida's Cape Canaveral Space Force Station and California's Vandenberg Space Force Base, respectively — delivered a total of 42 Starlink internet satellites into orbit, with each rocket's first stage acing an offshore landing. The successful SpaceX landings followed a failed Falcon 9 rocket landing on Aug. 28 during a booster's 23rd flight, a record for SpaceX. 

"Great work by the SpaceX team," SpaceX CEO Elon Musk wrote on X (formerly Twitter) after the double launch. 

The space action began in Florida with the stunning predawn launch of SpaceX's Starlink 8-10 mission, which lifted off at 3:43 a.m. EDT (0743 GMT) of a Falcon 9 rocket carrying 21 Starlink satellites, 13 of which are equipped with new "Direct to Cell" capabilities to connect directly with smartphones on Earth. (SpaceX has a deal with T-mobile to provide direct-to-cell access as it builds a vast megaconstellation of Starlink satellites.) 

The first-stage booster on the flight completed its 18th launch and landing after flying 13 Starlink missions, a Dragon cargo flight for NASA and three commercial satellite missions. It touched down on the SpaceX drone ship Just Read The Instructions in the Atlantic Ocean.

SpaceX followed its Florida Starlink launch with the Starlink 9-5 mission, which lifted off just 65 minutes later at 1:48 PDT (4:48 a.m. EDT/0848 GMT) from Vandenberg's Space Launch Complex 4 East. 

That mission delivered another 21 Starlink satellites, including 13 more Direct to Cell satellites, into orbit on what was the ninth flight of its Falcon 9 booster. It touched down on SpaceX's drone ship Of Course I Still Love You in the Pacific Ocean.