For some people it's not an adrenaline rush but a strong curiousity about what the US gov doesn't want you to know. Like all the warnings I received about travel to East Germany even after the wall came down (I was working for a defense contractor at the time). Project security warned us that there would be spies hiding behind every bush.
When we got to Checkpoint Charlie there were just a few tourists milling about the small section of wall that remained, and an old German couple renting a hammer and chisel so you could chip off a piece of the wall yourself. When we spoke to the old couple they suddenly became alert and asked us, rather loudly, if we were Americans. Immediately, out of the corner of my eye I noticed a middle-aged woman sitting on a bench look up, and a young guy dart out of a doorway and start walking our way. We took the hammer and chisel and started chipping at the wall while keeping an eye on the locals nearby, who suddenly seemed very interested in us. An older man standing close to the wall reached into his pocket and pulled out a lighter but did not light the cigarette hanging from his mouth, an obvious signal to other members of his surveillance team.
When a German couple posing as tourists came up and asked us where we were from we recognized that they were obviously trying to recruit us to spy for the Eastern Bloc. But we were too clever, pretending that we were drunk and did not speak English, and meandered back to the train station with our chunk of the wall.
When we got to Checkpoint Charlie there were just a few tourists milling about the small section of wall that remained, and an old German couple renting a hammer and chisel so you could chip off a piece of the wall yourself. When we spoke to the old couple they suddenly became alert and asked us, rather loudly, if we were Americans. Immediately, out of the corner of my eye I noticed a middle-aged woman sitting on a bench look up, and a young guy dart out of a doorway and start walking our way. We took the hammer and chisel and started chipping at the wall while keeping an eye on the locals nearby, who suddenly seemed very interested in us. An older man standing close to the wall reached into his pocket and pulled out a lighter but did not light the cigarette hanging from his mouth, an obvious signal to other members of his surveillance team.
When a German couple posing as tourists came up and asked us where we were from we recognized that they were obviously trying to recruit us to spy for the Eastern Bloc. But we were too clever, pretending that we were drunk and did not speak English, and meandered back to the train station with our chunk of the wall.