FILE - In this April 1, 2009, file photo U.S. President Barack Obama and Russian President Dmitry Medvedev, left, meet ahead of the G20 summit in London. Early in his presidency, Barack

 

              FILE - In this April 1, 2009, file photo U.S. President Barack Obama and Russian President Dmitry Medvedev, left, meet ahead of the G20 summit in London. Early in his presidency, Barack
FILE - In this April 1, 2009, file photo U.S. President Barack Obama and Russian President Dmitry Medvedev, left, meet ahead of the G20 summit in London. Early in his presidency, Barack Obama replaced a George W. Bush-era plan for missile defense in Europe that had roiled relations with Russia. Obama says his four-stage plan would protect Europe and the United States as foes develop more sophisticated missiles. The announcement initially eased tensions with Moscow, which considered the previous plan a threat to its nuclear might. Obama has proposed cutting missile defense spending in 2013 by about 7 percent, to $9.7 billion. (AP Photo/Alexander Zemlianichenko, File)