Fearing Copycat Attacks, U.S. Officials Step Up Security
This article is available to read at the Associated Press Archive Link here: http://www.apnewsarchive.com/2016/US-steps-up-security-at-major-transit-hubs-as-intelligence-officials-warn-of-risk-for-copycat-attacks/id-82b75dd259e443f4b005f10176cf308f