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Photo by: Jacquelyn Martin

The book entitled: "Duty: Memoirs of a Secretary of War," by former Defense Secretary Robert Gates is seen in Washington, Wednesday, Jan. 8, 2014. The White House is bristling over former Defense Secretary Robert Gates' new memoir accusing President Barack Obama of showing too little enthusiasm for the U.S. war mission in Afghanistan and sharply criticizing Vice President Joe Biden's foreign policy instincts. (AP Photo/Jacquelyn Martin)

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