Christine Sloan was there when agents visited a Bergen County school on Tuesday. An FBI intelligence analyst who did not wish to be identified spoke at the Bergen Arts and Science Charter School in Hackensack.

He warned students about a new threat – a sophisticated recruitment video trying to lure them into joining the terrorist group ISIS.

"There's a role for everybody. Every person can contribute to the Islamic State," a young Canadian man tells viewers in the recruitment video. "You can even come here and rebuild."

""It definitely was eye-opening," said high school senior Zoey Zibor. "You know, you learn that it's in your own backyard. It's Americans citizens wanting to join these terrorist groups."

The young Canadian who appears in the recruitment video ended up dying while fighting as a member of ISIS in Syria.

"It's definitely a bad thing," said senior Basik Gorkem.

The Bergen County school was one of many the FBI has come to with its alarming message – regular American kids could be vulnerable to this kind of propaganda.