LONDON, ENGLAND - APRIL 12: Gallery technicians at Sotheby's auction house adjust 'The Scream' by Edvard Munch on April 12, 2012 in London, England. The iconic painting is on public exhibition in London for the first time ahead of its auction in the 'Impressionist and Modern Art Evening Sale' at Sotheby’s New York on May 2, 2012 where it is expected to fetch in excess of 50 million GBP. (Photo by Oli Scarff/Getty Images)
