Yep. You've signed many contracts agreeing to that by the time you're allowed to access anything secure.
At a prior job, we used to joke about "TOP SECRET cupcakes": once you brought them into the SCIF, they could never be taken back out.
While Snowden, WikiLeaks, and others are demonstrating that every country may be a leaky ship information wise, the scale of the USG information security apparatus is absolutely amazing, especially if you've also gotten to see how some smaller countries do it.
And as a visitor you must hand over all you electronic devices (which are locked away and given back to you on exit) before going beyond reception.
Years ago I interviewed at hunting's (a List X arms manufacturer) and the interviews where done in a separate room adjacent to reception you never even went inside the plant.
At a prior job, we used to joke about "TOP SECRET cupcakes": once you brought them into the SCIF, they could never be taken back out.
While Snowden, WikiLeaks, and others are demonstrating that every country may be a leaky ship information wise, the scale of the USG information security apparatus is absolutely amazing, especially if you've also gotten to see how some smaller countries do it.