This along with the net released nuke manuals should seriously freak you out.

Via Desi:
(CBS) The recent security breach at Los Alamos National Laboratory was very serious, with sensitive materials being taken out of the facility — possibly including information on how to deactivate locks on nuclear weapons, officials tell CBS News.

Officials say there is no evidence the information taken from Los Alamos was sold or transferred to anybody else, but there is no way to be sure right now.

Update: Democrats call for an investigation.