Associated Press
Tourists stand on the sidewalk outside the White House on Pennsylvania Avenue in Washington, Tuesday, Sept. 23, 2014, as anti-war activists angered by military strikes in Syria block the northwest gate. Security at the White House perimeter was already elevated since last Friday when a 42-year-old Army veteran climbed over the fence and dashed across the north lawn and entered the executive mansion before being stopped. (AP Photo/J. Scott Applewhite)

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