Q clearance

In 1946 U.S. Army Counter Intelligence Corps Major William L. Uanna, in his capacity as the first Chief of the Central Personnel Clearance Office at the newly formed Atomic Energy Commission, named and established the criteria for the Q Clearance.

https://en.wikipedia.org/wiki/Q_clearance

https://en.wikipedia.org/wiki/William_L._Uanna

https://en.wikipedia.org/wiki/Counterintelligence_Corps