I spent 30 years working for the US Army and various contractors that sold into the most sensitive areas of the government. I've never heard of a hair follicle or even a pee test being administered. They ask on the form and then they go around asking your friends and neighbors and coworkers and the local police departments, etc... whether you have ever been known to take drugs. A med-mj card would be really bad to have if you didn't disclose it. Many things that are taboo on the security clearance are forgiveable if you disclose them and swear (and possibly prove) that you aren't going to use them anymore. THe one thing that is clearly UNFORGEABLE is lying on your applications and other attestations. The whole security clearance thing is trust, and TRUST is the #1 thing they are lookign for.

