On April 24, 1933, the "New York World-Telegram" published an article attacking the mural as anti-capitalist propaganda. As a defiant response to the article, Rivera or one of his assistants added a portrait of Lenin to the mural, which had not been apparent in initial sketches. The Rockefellers did not express any visible concern about the mural. On April 28, to ensure that the late addition of Lenin would be undetected, Rivera sent his assistants to make sure that there was no trace of the Lenin portrait in the blueprints and outlines for "Man at the Crossroads". Rivera thought that if anyone were to check the blueprints, they would not be able to discern the hidden portrait of Lenin unless they looked closely. He believed that his close relationship with the Rockefellers would permit the surreptitious addition of the portrait. The Lenin portrait would still have gone unnoticed if not for a mistake made by workmen applying a final coat of paint to the wall above Rivera's mural. Some of the paint dripped onto the mural, and when Raymond Hood went to examine the drip, he found the portrait of Lenin.