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Photo by: J. Scott Applewhite

John Koskinen, President Barack Obama's choice to head the Internal Revenue Service (IRS) testifies on Capitol Hill in Washington, Tuesday, Dec. 10, 2013, before the Senate Finance Committee hearing on his nomination. Koskinen, 74, is a retired corporate and government official with experience managing numerous organizations in crisis. (AP Photo/J. Scott Applewhite)

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