A U.S. Parks Police officer with an assault rifle patrols the Washington Monument in Washington, DC., after a bombing at the Boston Marathon in Boston, Mass., April 15, 2013. (Andrew S Geraci/The Washington Times)
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A U.S. Parks Police officer with an assault rifle patrols the Washington Monument in Washington, DC., after a bombing at the Boston Marathon in Boston, Mass., April 15, 2013. (Andrew S Geraci/The Washington Times)
