FILE - In this Feb. 11, 2015, file photo, Vice President Joe Biden listens at left, as President Barack Obama speaks about the Islamic State group in the Roosevelt Room of the White House in Washington. The White House sought to show that the array of U.S. military actions on President Barack Obama’s watch have been on solid legal footing, with a new report on Dec. 5, 2016, shedding light on how an evolving interpretation of a 9/11-era law has been used to justify new and emerging threats overseas. (AP Photo/Evan Vucci)
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