Live coverage: SpaceX launches its fifth Falcon 9 flight of the year

The U.S. Defense Department’s internal watchdog has opened a probe into whether the Pentagon’s contracts with United Launch Alliance were properly awarded after a former ULA executive implied the government rigged a recent procurement in favor of the company.

A SpaceX-owned Dragon cargo craft left the International Space Station on Friday and flew back to Earth for a parachute-assisted splashdown in the Pacific Ocean with a dozen mice and more than 3,000 pounds of experiment specimens and space hardware.

With plans to put 11 new-generation communications satellite on SpaceX’s next Falcon 9 rocket launch, Orbcomm has moved first in line on the launch company’s manifest after a failure in June. Orbcomm’s CEO, Marc Eisenberg, spoke with Spaceflight Now’s Stephen Clark after announcing his firm’s launch plans.