<p>Whether its terrorists, anarchists, cyber criminals or nation states, America has a target on its back. WTOP National Security Correspondent J.J. Green investigates the threats facing the U.S., the people behind them, the agencies fighting them and their impact on Americans. </p>
The surprise attack by ISIS in Brussels, again stunned the world and demonstrated how hard it is to stop them. As a result, the FBI and other U.S. intelligence officials are redoubling efforts to make sure security is air tight - especially in Washington.
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