The 27-year-old is revealing the disturbing details of his journey into the heartland of terror — and warning others not to follow in his footsteps.
Militant Islamist fighters parade on military vehicles along the streets of northern Raqqa province June 30, 2014.
By Richard Engel, Richard Engel, Ben Plesser, Ben Plesser and Tracy Connor, Tracy Connor
He left the United States to join ISIS and then fled after five months. Now a New York City man is revealing the disturbing details of his journey into the heartland of terror — and warning others not to follow in his footsteps.
Richard Engel interviews a New York man, identified only as 'Mo', who joined and escaped ISIS for an NBC News exclusive.