FILE - In this March 20, 2012 file photo, Marine Gen. John Allen, the top U.S. commander in Afghanistan testifies on Capitol Hill in Washington. Allen said Thursday he prefers a robust U.S. combat force of 68,000 in 2013, signaling a potential halt in the drawdown and complicating any effort by President Barack Obama to accelerate the timetable after more than a decade of war. (AP Photo/J. Scott Applewhite, File)
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