Nestled behind a forested ridgeline on the outskirts of Knoxville, Tennessee, is the sprawling Y-12 National Security Complex, America's "Fort Knox" of weapons-grade uranium. The complex's security cameras and machine gun nests are designed to repel an attack by the world's most feared terrorist organizations, but they were no match for Sister Megan Rice, an 83-year-old Catholic nun armed with nothing more than a hammer and bolt cutters.

In the dark morning hours of July 28, 2012, Rice and two fellow anti-war activists bushwhacked up to the edge of Y-12, cut through three separate security fences, and sprayed peace slogans and human blood (see below) on the wall of a building that is said to hold enough weapons-grade uranium to obliterate human civilization several times over. They remained inside Y-12 for more than an hour before they were detected.

"The security breach," as the Department of Energy's Inspector General later described it, exposed "troubling displays of ineptitude" at what is supposed to be "one of the most secure facilities in the United States." At a February hearing of the House Energy and Commerce Committee, multiple members of Congress thanked Rice for exposing the site's gaping vulnerabilities. But that didn't deter federal prosecutors from throwing the book at Rice and her accomplices: Greg Boertje-Obed, a 57-year-old carpenter, and Michael Walli, a 63-year-old Vietnam veteran.
http://www.motherjones.com/politics/2014/01/nun-megan-rice-sentencing-y-12-nuclear-weapons-security?google_editors_picks=true