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.

U.S. military officials and United Launch Alliance have dedicated the planned launch Saturday of an Atlas 5 rocket with the military’s winged mini-space shuttle to coronavirus first responders, front-line workers and all who have been affected by the pandemic.

Towering more than 20 stories tall, the 8-million-pound mobile gantry at the Atlas 5 rocket’s launch pad at Vandenberg Air Force Base, California, was retracted into position late Friday for liftoff of NASA’s InSight mission to Mars.