Henri Cartier-Besson spoke about "the decisive moment", and ever since then legions of "street photographers" have been trying to replicate what he was talking about. The problem, of course, is that there are legions of Cartier-Bessoin "wannabes" roaming the streets shooting "candids" and feeling proud of themselves. Even worse, people are holding workshops to "teach" people how to shoot "on the street". A pox on all of them. There is nothing to celebrate in photographs that cause other people to feel superior to the subject or cause the photographer to feel "clever". My advice to anyone who wishes to shoot people on the street is to view Don McCullin photographing in Whitechapel. That is worth far more than dropping cloise to three thousand dollars on a "workshop"