Video: Fourth X-37B launch highlights

NASA wants to fly an astronaut on Russia’s next Soyuz mission to the International Space Station in April, a measure the agency says would ensure a continued U.S. presence on the research outpost in case of delays in the launch of SpaceX’s next Crew Dragon flight.

Russian rocket technicians planned to swap out a failed inertial measurement unit inside a Soyuz rocket overnight Sunday after a failure in the navigation system forced officials to abort the booster’s planned launch of five satellites from French Guiana.

A test-firing of a twice-flown Falcon 9 booster Friday at Cape Canaveral paved the way for SpaceX’s next launch, scheduled for Monday night with a heavyweight Boeing-built communications satellite to beam broadband signals to Japan and the Pacific islands.