Q&A with Claire Leon, director of launch enterprise directorate at SMC

Concerns over an unspecified part flying on the upper stages of United Launch Alliance’s rockets have delayed the launch of a GPS satellite on a Delta 4 booster from July 25 to no earlier than Aug. 22. The same issue has also delayed an Atlas 5 launch.

Watch a time-lapse video of the 229-foot-tall (70-meter) Falcon 9 rocket being lifted into place on pad 39A in readiness for the launch of the SES 10 communications satellite. This will be a major milestone for SpaceX as it will mark the first time a flown Falcon 9 first stage has been reused.

United Launch Alliance vows a “seamless” switch from the Atlas 5 to the new Vulcan rocket in launches of Boeing’s astronaut taxis.