Transcript for Nun Breaks Into Top Secret Nuclear Center
Now to the major security breech forcing the government to shut down a nuclear weapons site tonight. Take a look at this picture. She is the reason why. An 82-year-old nun who cut through fences, got... See More
Now to the major security breech forcing the government to shut down a nuclear weapons site tonight. Take a look at this picture. She is the reason why. An 82-year-old nun who cut through fences, got through hi-tech security. Why? What does it say about how secure our sites are? Reporter: This nun did what no one should be able to do. They brazenly broke into one of the country's highest security facilities, the site of protests in the past. The target, the countrias largest stockpile of uranium for nuclear bombs in tennessee. In the middle of the night, the three breeched the perimeter fence and then three more fences and motion detectors, reaching the building holding that uranium, splashing blood on it before guards, who have the authority to shoot to kill, finally arrested the three. You have to be concerned when it's a nun who helps you understand your nuclear weaknesses in security. Reporter: Such a massive breakdown in security that the facility is shut down tonight. Already the government admits there were security execution deficiencies. Government officials declined our request for interview. So how can three protesters break into one of the country's most heavily guarded facilities? That's a good question. A government spokesman told us on the phone. He added that the break-in was not good. But the government insists the intruders were not even close to getting into the building. Still an extremely embarrass moment in these tense times. Our thanks to david tonight.
This transcript has been automatically generated and may not be 100% accurate.