Barack Obama, Benjamin Netanyahu

FILE – In this Sept. 21, 2011 file photo, President Barack Obama meets with Israeli Prime Minister Benjamin Netanyahu at the United Nations. In his most explicit warning yet, President Barack Obama declares the United States could take military action to prevent Iran from acquiring a nuclear weapon. But Obama also says he will try to persuade Israeli Prime Minister Benjamin Netanyahu in a crucial meeting next week to avoid a pre-emptive strike against Iran. (AP Photo/Pablo Martinez Monsivais, File)