"He didn't have a security clearance in the way that folks in the military or intelligence agencies ... from a background check to a polygraph test, depending on the tier. The purpose is to ...

“He didn’t have a security clearance in the way that folks in the military or intelligence agencies ... from a background check to a polygraph test, depending on the tier.

Most Americans, like federal workers or military personnel, need a formal security clearance before they can gain access to classified information or secured facilities. The process can include ...