Amtrak police officers stand guard at the front of Union Station as they conduct enhanced security operations around the area as a proactive measure...
{"Image ImageDescription": "UNITED STATES - SEPTEMBER 16: Amtrak police officers stand guard at the front of Union Station as they conduct enhanced security operations around the area as a proactive measure related to the Navy Yard shooting incident in Washington on Monday, Sept. 16, 2013. (Photo By Douglas Graham/CQ Roll Call)", "Image Copyright": "? 2013 CQ Roll Call"}