Associated Press
In this May 11, 2012 photo, Dorothy Lichtenstein, widow of pop artist Roy Lichtenstein, stands between his artworks “Cold Shoulder,” left, and “Masterpiece” at the Art Institute of Chicago. The museum has opened “Roy Lichtenstein: A Retrospective,” which runs through Sept. 3 before traveling to Washington, London and Paris. (AP Photo/Caryn Rousseau)

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