Well, here's some advice on shooting in the middle of crowded stuff :P - Film: use b&w film that gives high contrast...like Ilford HP5 (plus) or Kodak T400CN or Ilford XP2, all are C41 films, so you can have them developed at any color/c41 machine. The main advantage is the speed, since all are 400 and the fine grain. Film like Tmax 100 is too low on contrast for me personally and Tri-X & Portra b&w are too grainy. - Always focus on single people. Usually you could go with one 'motto': the closer the better. So your lens is perfect. The 80mm is good if you don't feel being close to someone you want to shoot, while the 35mm is even better if you're sure nobody would mind you shooting them from real close. - Don't be friendly towards anyone you see, meet or want to shoot. Over here in europe police often have undercover agents who dress up like protestors, but when police wants to make arrests, these guys suddenly assist them. So never ever, ever, ever, ever, ever try to move along with protestors or try to mix into the crowd or make any comments to anyone you see. Just take care of yourself and try to see what's going on, so you won't get stuck anywhere. If we'd be able to be part of the official press, we might get around easier...especially when there's trouble :)