In an exclusive online sale from June 5 to June 19, Christie's presents 33 works by Abstract Expressionist artist Willem de Kooning. The works come from the estate of Dr. Henry Vogel, de Kooning's psychiatrist and friend. Find out more: http://bit.ly/16tpewB Footage from Willem de Kooning: Artist, courtesy of Masters & Masterworks: http://www.mastersmasterworks.com/