AT had a chance to catch up with Steven Emerson, head of The Investigative Project on Terrorism, and hear his assessment of the ISIS threat here on American soil. Emerson runs the country’s top data center on Islamic terror groups in the United States, working like a man possessed, and accomplishing the work of thousands on sheer guts and determination to protect our country. " The FBI has been handcuffed in terms of investigating religious extremists in mosques, as a result of guidelines put out by the attorney general earlier this year. And so therefore, there is… a definite problem...