A New York City man who admits he betrayed his country by joining ISIS tells publicly for the first time how he was seduced by the terrorist organization.

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.

A valedictorian who wanted to be a doctor, a computer gamer who had Harvard in his sights and a pot-smoking hip-hop fan who traded in atheism for extremism.

There is another side to the ISIS menace, hidden in the most familiar of places: American cities and suburbs, where recruits live among relatives and neighbors.

The 23-question form looks like a standard job application — save for the black ISIS logo in the top right corner.

ISIS engaged in close-quarters combat with Kurdish forces before being repelled by reinforcements and airstrikes, security sources told NBC News.