Pablo Picasso Trotskyist and anti-Stalinist André Breton was more blunt; refusing to shake hands with Picasso, he told him: "I don't approve of your joining the Communist Party nor with the stand you have taken concerning the purges of the intellectuals after the Liberation". Picasso was against the intervention of the United Nations and the United States in the Korean War and he depicted it in "Massacre in Korea". The art critic Kirsten Hoving Keen says that it is "inspired by reports of American atrocities" and considers it one of Picasso's communist works. In 1962, he received the Lenin Peace Prize. Biographer
Guernica (Picasso) allegedly asked him, upon seeing a photo of "Guernica" in his apartment, "Did you do that?" Picasso responded, "No, you did." The photographer Dora Maar—who had worked with Picasso since mid-1936, photographing his studio and teaching him the technique of cameraless photography— documented the stages "Guernica" went through on its way to completion. Apart from their documentary and publicity value, Maar's photographs "helped Picasso to eschew color and give the work the black-and-white immediacy of a photograph", according to John Richardson. The work was painted using a matte house paint specially formulated at Picasso's request to have the least possible