How An 82-year-old Exposed Security Lapses At Nuclear Facilities

Huge Nuclear Security Flaw Exposed By 82-Year-Old Nun
Y-12 protesters Sister Megan Rice, center, and Michael Walli, in the background waving, are greeted by supporters as they arrive for a federal court appearance Thursday, Aug. 9, 2012 in Knoxville, Tenn. Along with a third defendant third, Greg Boertje-Obed, the pair were indicted on charges stemming from their alleged July 2 infiltration of the Y-12 nuclear weapons plant in Oak Ridge, Tenn. (AP Photo/Knoxville News Sentinel, Michael Patrick)
Y-12 protesters Sister Megan Rice, center, and Michael Walli, in the background waving, are greeted by supporters as they arrive for a federal court appearance Thursday, Aug. 9, 2012 in Knoxville, Tenn. Along with a third defendant third, Greg Boertje-Obed, the pair were indicted on charges stemming from their alleged July 2 infiltration of the Y-12 nuclear weapons plant in Oak Ridge, Tenn. (AP Photo/Knoxville News Sentinel, Michael Patrick)

The hammering on the wall of America's premier storage vault for nuclear-weapons grade uranium in pitch-darkness six weeks ago was loud enough to be heard by security guards. But they assumed incorrectly that workmen were making an after-hours repair, and blithely ignored it.

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