[fishpen0]

There are a handful of key litmus tests that are part of the background check. If you are/were a felon, If you lie at all during the check, If you are in extreme debt, If they find public record of you being anti-american, If you fail a drug test.

These all come up during the screening interviews of your peers, family, and coworkers. I have done about a half dozen or so of these for former peers, friends, and colleagues who have moved on to do public sector or join private military companies that needed clearance.