Noah Shachtman at Wired's "Danger Room" blog writes,
I can't tell you how many times, after listening to some lame explanation about why security at the Los Alamos nuclear lab still wasn't fixed, I though to myself, "What are they, stoned?"Link to full text, with an update from someone who appears to be Los Alamos Nuclear Lab insider. Here is another trippy-dippy post on "Danger Room" about a military powerpoint presentation featuring dolphins that shoot death rays out of their eyes: Link.
The answer, it turns out, is yes. At least some of 'em are. An Energy Department investigation, unearthed by Time, has turned up "35 cases involv[ing] drug use within the year prior to requesting a security clearance."