Or no cause needed when accessing a restricted facility. Not saying that's the case here. Contrast this to Russia where documents can be demanded anytime, anywhere for any reason.. I was there 12/2001 and with a dark-haired Russian girl who could have been mistaken for a chechyen, together we looked a bit out of place and when we went out, no more than 100 feet from our building the militsya surrounded us to peruse our documents. No cause needed other than the way we looked. So, this isn't the end of the world, nor the beginning of the end...