Los Alamos Nuclear Laboratory has inadvertently released highly classified nuclear weapons material again by e-mail. The error-prone lab is one of the U.S.s three nuclear weapons laboratories. A crack dealer was found in possession of lab nuclear weapons data on a USB stick last October. The lab has a history of bad classified data handling discipline and is managed by LANS National Security (LANS) LANS board members have now received security sensitivity training. It is not known why they had not received such training before.”]
Source: https://www.csoonline.com/article/2121712/los-alamos-nuclear-lab-loses-more-data.html