Unlike politicians, the military + contractors take their responsibilities re. controlled information relatively seriously. The normal practice is to not have

Unlike politicians, the military + contractors take their responsibilities re. controlled information relatively seriously. The normal practice is to not have anything that is clearance-controlled sitting out anyway (it's usually stored behind extra levels of security scaled to the secrecy), and to control access to that information on a fairly granular level. Visitors to those facilities (of a variety of clearance backgrounds) are regular, so anything beyond ITAR (which you, as the child of an ITAR-accessible employee, and thus likely a US citizen/green card holder would have had access to) is going to be locked up by default.