Q&A with Martin Halliwell, chief technology officer at SES

Check out imagery from Friday’s liftoff of a previously-flown Falcon 9 rocket booster with the BulgariaSat 1 communications satellite from Florida’s Space Coast.

United Launch Alliance said Monday it did not submit a proposal in a competition to launch a U.S. Air Force GPS navigation satellite, apparently relinquishing the contract to rival SpaceX, the only other company certified to launch the mission.

SpaceX’s latest Starship prototype, on its launch pad in South Texas, is ready for the rocket’s most daring test flight yet.