FILE - This Friday May 2, 2014 file photo shows an exterior view of the Two Kingdom Street building which houses the headquarters of AstraZeneca, in the Paddington area of London. The board of AstraZeneca has rejected the improved $119 billion takeover offer from U.S. drugmaker Pfizer, Monday May 19, 2014, a decision that has caused a sharp slide in the U.K. company's share price as investors think it effectively brings an end to the protracted and increasingly bitter takeover saga. (AP Photo/Matt Dunham, File)