There are plenty of rivalries in the US launch industry. People who build big and brawny machines tend to have egos to match.

A prototype of Astra's Rocket 4 launch vehicle. Credit: Astra PARIS — Astra is targeting next summer for the first flight of its Rocket 4 vehicle as the company prepares to reenter the launch market.

The U.S. Federal Aviation Administration (FAA) has cleared Firefly Aerospace to resume launches of its Alpha rocket. The approval follows a months-long review of the failed "Message in a Booster" ...