security clearance

Security Clearance

Loren Thompson— The U.S. government limits access to sensitive information by granting (or denying) security clearances after conducting background investigations. The system is expensive to administer, because five million Americans hold active clearances, and over a hundred federal agencies require clearances to participate in certain aspects of their work. In addition to such well-known designations as Secret and Top Secret, there are numerous specialized types of clearances with names like Majestic, Cosmic and Ultra that require rigorous background checks.

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