“In his introduction to Robert Frank’s seminal photo book, “The Americans,” Jack Kerouac claimed the photographer had captured “scenes that have never been seen before on film.” He was referring not to particular people, places or objects but to “the humor, the sadness, the EVERYTHING-ness and American-ness” Mr. Frank documented as he traveled the country on a Guggenheim Fellowship beginning in 1955. At a time when mainstream publications tended to favor a rosy view of American life, Mr. Frank presented a comparatively stark vision that also challenged the aesthetics of popular photography.”