Since the invention of small hand-held cameras and faster films in the late 19th century, photographers have been fascinated with capturing everyday life in the urban environment. An exhibition of nearly 90 works will celebrate how photographers such as Harry Callahan, Bruce Davidson, Philip-Lorca diCorcia, Walker Evans, Robert Frank, and Beat Streuli creatively pursued a new genre of street photography, capturing the diversity and rapid pace of modern life.I Spy: Photography and the Theater of the Street, 1938–2010 is on view at the National Gallery of Art in Washington D.C. from April 22 to August 5, 2012.