It has been a turbulent year, at home and abroad. Here are a selection of images reflecting just some of the major news stories of 2017.
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President Donald Trump selected retired Marine Gen. Jim Mattis as his secretary of defense. With Republicans in charge of Congress, a priority of the new team is to boost the military budget by tens of billions of dollars. The administration has also loosened the rules of engagement and increased the number of U.S. troops in Afghanistan. (Susan Walsh/AP)