A group of foreign nationals working on one of NASA’s major projects found a way to choose their own security clearances to gain access to sensitive technologies. The way they did it was pretty simple. NASA just let them do it. Belva Martin is director of Acquisition and Sourcing Management Issues at the Government Accountability Office. In a new GAO report, she looks at NASA’s supply chain security. She shared a few ways the agency can tighten up its grip on In Depth with Francis Rose.