If you think a guardsman standing behind a "federalized" (read: "unionized") airport screener, in plain view with a rifle (unloaded or not) is any more than fluf to make the 80 year old ladies feel secure before their strip search then you are truly clueless..
Wrong. There is nothing preventing the National Guard from being armed with loaded weapons. That is a policy not a law. It started after Kent State and for some stupid reason just continued.