American artist Roy Lichtenstein studied at the Art Students League. He was conscripted to the US Army during World War II, after which he attended Ohio State University. In the 1960s, along with Andy Warhol and Jasper Johns, Lichtenstein became a leading figure in the Pop Art movement. A major travelling retrospective of his work took place at the Art Institute of Chicago, the National Gallery of Art, Washington, Tate Modern, London, and the Centre Pompidou in Paris between 2012 and 2013.