Almost a "no fun allowed" location. Everything was...

Almost a "no fun allowed" location. Everything was super serious. I had to spent about 10 minutes in security checks, and then the fire alarm sounded and everyone had to leave... then back to the airport style security check again... The architecture and historical significance of the place is a must see - but be on your best behavior. If you are coming here for the tour, try not to bring a big bag, and don't wear a belt or metal items. God help you if you forget and end up bringing a pocket knife or something questionable...