The banlieues are the suburbs (of Paris). The word has become terminology which is used in international media. It's valid English: http://en.wikipedia.org/wiki/Banlieue
In fact, we «banlieusards» from Paris have a tendency to consider ourselves as «THE» banlieue. The most emblematic one.
But most big cities have one of their own. Marseilles, Lyon and Lille have theirs.
Yeah, but you have to explain that subburbs are not the same in France as in the U.S. Here, subburbs are generally where educated, middle-class people go to live (although that is changing in some places).
In France, the "banlieu" subburbs are what we would call the "inner-city". Speaking colloquially, the ghetto.
Big difference, and just translating "banlieu" as "subburb" does not explain this.
Well, knowledge does not jump from written media to brain, else, everyone would be doing their own molotov cocktail (I still prefer the Joliot-Curie), TNT (pretty easy, we learnt it at school while doing mono nitration of toluene), nuclear bomb ... that is what makes the world quite safe in fact.
I was forced to borrow from the adult library when I was 11 because I had already read everything and I was too demanding. But I guess it was not enough :)
But I don't think hidden social rules are taught in books. Behaving «socially correctly» is not taught either. Which so far has been quite my main problem.
The BAC are the "Brigade anti-criminalité", that term is more obscure. Basically a special unit of the police. http://fr.wikipedia.org/wiki/Brigade_anti-criminalit%C3%A9