Your papers, please (Score 1, Flamebait)

I wonder how they handle situations where an individual working for the US government has to travel with classified data on a laptop, and can therefore not allow any uncleared persons access to the information without it being considered a breach of security? I can see something like that happening to me someday if I ever have to travel for work. Maybe they have special travel "papers" for those carrying sensitive data? Why does that give me images of gestapo saying, "Vee have vays of making you talk!"