LONDON - APRIL 14: A Sotheby's security guard stands at a gallery entrace where Mark Rothko's 'Orange, Red, Yellow' is hung on April 14, 2008 in London, England. The artwork, estimated to sell for in excess GBP 30 million and is part of highlights from the New York Contemporary Art Sale to be shown in an exhibition from April 13 to 16, 2008 in Sotheby's London. (Photo by Cate Gillon/Getty Images)
