http://www.crypto.com/blog/titansFrom SlashDot:
"Computer security guru Matt Blaze takes a tour of a decommissioned ICBM complex in Arizona. Cool photos, insightful perspective on two man control, perimeter security, human factors and why we didn't blow ourselves up. From the article: 'The most prominent security mechanism at the Titan site, aside from the multiple layers of thick blast-proof entry doors and the fact that the entire complex is buried underground, was procedural: almost all activities required two person control. Everywhere outside of the kitchen, sleeping quarters and toilet were "no lone zones" where a second person had to be present at all times, even for on-duty members of the launch crews.'"