Vice President Joe Biden, right, shakes hands with Dir. of the CIA David Petraeus, center, after administering the oath of office during a swearing-in ceremony in the Roosevelt Room of the White House in Washington, Tuesday, Sept., 6, 2011. On the left is Petraeus' wife Holly Knowlton Petraeus. (AP Photo/Pablo Martinez Monsivais)

Associated Press
Vice President Joe Biden, right, shakes hands with Dir. of the CIA David Petraeus, center, after administering the oath of office during a swearing-in ceremony in the Roosevelt Room of the White House in Washington, Tuesday, Sept., 6, 2011. On the left is Petraeus' wife Holly Knowlton Petraeus. (AP Photo/Pablo Martinez Monsivais)
Vice President Joe Biden, right, shakes hands with Dir. of the CIA David Petraeus, center, after administering the oath of office during a swearing-in ceremony in the Roosevelt Room of the White House in Washington, Tuesday, Sept., 6, 2011. On the left is Petraeus' wife Holly Knowlton Petraeus. (AP Photo/Pablo Martinez Monsivais)
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