Studio Entertainment: Often regarded as Disney's most visible business, Studio Entertainment is actually subject to a great deal of variability in terms of both revenue and profit generation, as its performance is driven largely by Disney's ability to produce hit movies to be released in theaters, on television, and on home video. A flop, like the 2002 movie Treasure Planet, can be quite detrimental to the company's profits. On the other hand, a blockbuster hit, like the Pirates of the Caribbean series, can boost sales and profits substantially. In September 2009, Disney Studios Chairman Dick Cook was forced to resign at the request of CEO Robert Iger, who had been unhappy with the studio's direction and performance. In July 2010, the company announced it would be selling its independent film Miramax unit for $650 million to a group of investors including Ron Tutor, Colony Capital, James Robinson, and an unidentified Middle Eastern investor group.[2]