I am planning my first trip to Mexico City. Since I am not travelling alone, I have to ask some basic questions about the safety of the city for the benefit of my companions. For my part, I tend to think that everything written about it in American papers is absolute garbage—just like whatever Americans between the coasts think about NYC and LA is nonsense. (Everywhere I go I have to explain that Taxi Driver and Escape from New York are not based on facts). So I want to ask people who live in either LA, SFO, or NYC about Mexico City. Is it fairly safe if we stay in the center and just stick to the usual tourist sites? I know the question is broad, but, as I mentioned, I wouldn't ask if I traveled alone. Many thanks.