I love that one Bougal. I loved it so much I made it my desktop wallpaper.
His name is Garry Winogrand. He was a photographer in the 50s. You might also like Mary Ellen Mark, Diane Arbus, Callahan, Klein, Avedon and Friedlander's older stuff. I think I spelt like half of those names wrong, sorry. I know more goodies, but I need to dig up my old notes.