Darik's Boot and Nuke
Darik's Boot and Nuke ("DBAN") is a self-contained boot floppy that securely wipes the hard disks of most computers. DBAN will automatically and completely delete the contents of any hard disk that it can detect, which makes it an appropriate utility for bulk or emergency data destruction.

Physical Security Standards for Sensitive Compartmented Information Facilities
Physical security standards are hereby established governing the construction and protection of facilities for storing, processing, and discussing Sensitive Compartmented Information (SCI) which requires extraordinary security safeguards.