Cartier-Bresson spent more than three decades on assignment for "Life" and other journals. He traveled without bounds, documenting some of the great upheavals of the 20th century — the Spanish Civil War, the liberation of Paris in 1944, the fall of the Kuomintang in China to the communists, the assassination of Mahatma Gandhi, the May 1968 events in Paris, the Berlin Wall. And along the way he paused to document portraits of Camus, Picasso, Colette, Matisse, Pound and Giacometti. But many of his most renowned photographs, such as "Behind the Gare Saint-Lazare", are of seemingly unimportant moments of ordinary daily life.