Harvard Square is a destination for young people from all over the Greater Boston area. The crowd is biggest on Sunday, when I visited. As usuaI, I didn’t try for one or two "killer" photos. Instead, I shot a series that, I hoped, would collectively tell a story. I was so busy getting those few shots, however, that I missed the big picture, the hustle-and-bustle of the crowd, the flowing river of humanity. I’ll have to try again. The sun shone brightly when I arrived, but soon was obscured by dark clouds.