The pioneering photographer Robert Frank has died at the age of 94. He was best known for “The Americans,” a groundbreaking collection of black-and-white photographs that captured life in the United States in the 1950s, displaying raw images of racism, poverty and inequality. Frank once told The New York Times, “My mother asked me, 'Why do you always take pictures of poor people?' It wasn’t true, but my sympathies were with people who struggled. There was also my mistrust of people who made the rules.”