ISIS is on the run in, but it has left behind a generation of child soldiers brainwashed and trained to kill.
CBS News correspondent Charlie D'Agata, reporting from Iraq for "," saw just how the terror group turned children toward violence.
A former journalist showed D'Agata English textbooks that ISIS used to indoctrinate kids as young as 5.
"They are teaching and brainwashing each other with these books: 'I can shoot.' 'Yes you can.' 'He can bomb," the journalist read from a lesson.
"This is crazy here," D'Agata said, pointing to another page. It contained a lesson for telling time.
"You know how to tell the time in English, but rather than just having a regular clock it's a time bomb, it's a timer on a bomb," D'Agata said.
The book was used for first graders.
"Children of ISIS" will feature in the premiere of "CBSN: On Assignment" – a new primetime documentary series which first airs Monday, July 31, 2017, (10 p.m. ET/PT) on the CBS Television Network and on CBSN, the network's 24/7 streaming news service.