FILE- In this Friday, May 2, 2014 file photo, an exterior view of the Two Kingdom Street building which houses the headquarters of AstraZeneca, in the Paddington area of London. Pfizer Inc. has

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FILE- In this Friday, May 2, 2014 file photo, an exterior view of the Two Kingdom Street building which houses the headquarters of AstraZeneca, in the Paddington area of London. Pfizer Inc. has sought to allay concerns over its proposed $106 billion takeover offer of the Anglo-British firm AstraZeneca, insisting that its promises will be legally binding. In a memo Monday, May 12, 2104 to two parliamentary committees studying its proposed takeover, the U.S. drugmaker laid outs its vision ahead of testimony before the science and business committees. Crucially, the company sought to ease worries that British jobs will be lost and that the nation's science base will be undermined by the potential merger. (AP Photo/Matt Dunham, File)

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Associated Press
Mon, May 12, 2014 10:01 PM EDT