Break-In at Y-12 – the vulnerability of America’s nuclear-weapons sites
newyorker.com
newyorker.com
Bottom line is that security at this particular site was laughable. E.g.:
The Plowshares activists did set off an alarm.
But security officers ignored it, because
hundreds of false alarms occurred at Y-12
every month.
After cutting thru three fences and then spray painting the walls of a building, the protesters waited around and sang religious songs for a half an hour before they flagged down a passing rent-a-cop patrol car.The protesters were convicted of sabotage and sentenced to years in jail.
"The prison looked like an image on an old postcard, a haunting, uniquely American symbol of state power. And a thought occurred to me: the walls of the penitentiary guarding this pacifist were taller and more impenetrable than any of the fences at Y-12."
http://www3.cancer.gov/intra/dce-old/pdfs/ciabp.pdf
If someone knows better sources, please do post!