carl icahn wrote a letter to buy the pharmacy benefitsanager. cigna responded by saying that mr. icahn's view does not represent those ofgn s other shareholders. bertha coombs has been following lee drama for us. >>> carl icahn c megade megadeal a $60 billion folly. the activist investor when has taken a stake in cigna is urging others to vote against the deale arguing that insurers paying a 50% premium for express scripts at a time when the pharmacy management business model is under siege from regulators to the secretary o health and others who have been critic of confidential rebate agreements which allow the pbms to secure discounts from drugmakers. icuen also a that amazon's entrance into the pharmacy business recently acquiring pill pa will also dermine the deal. in his letter icahn warns purchasing express scripts will be one of the worst blunders in corporate history, up there with the time warner-aol fiasco and general ectric valued destruction. icahn believed cigna would be better off building its own pharmacy unit and returning cash to customers. does she argue said it would be better for cigna to build a pharmacy with enough scale and integrating benefits is what will help insure and pbm defend on