Detailed Instructions: Given a travel related situation, and given a specific question about the situation, summarize the question into a title
Q: I've heard that in some overnight trains, rooms don't lock (no door); instead its just a curtain. This means thieves can get in and out easily. Is this true? If so, how do my friends and I keep ourselves and our belongings safe? (Even if we secured it with some sort of lock and cable, if we were sleeping, I would imagine that thieves could just open everything up.)

A:
Overnight train luggage safety concerns in Europe