Live coverage: Falcon 9 blasts off with X-37B mini-shuttle

Look back on the launch Saturday of a Northrop Grumman Antares rocket from Wallops Island, Virginia, powered by a pair of kerosene-fueled RD-181 engines producing 864,000 pounds of thrust.

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.

Joe Anderson, vice president of business development and operations at Space Logistics LLC, recently discussed the company’s first Mission Extension Vehicle in an interview with Spaceflight Now. The first Mission Extension Vehicle is launching on the first commercial satellite servicing mission to dock with an Intelsat communications craft in geostationary orbit.