SpaceX pushed one of its most-used boosters to its limits with a launch Tuesday evening from Cape Canaveral, Florida. A Falcon 9 rocket using a booster for the 22nd time managed a successful recovery landing even though it was used to fly its payload,

SpaceX said Thursday it "forcefully rejects" the Federal Aviation Administration's conclusion that Elon Musk's company failed to follow U.S. regulations during two rocket launches, alleged violations carrying $633,