01/17/2015 01:45 pm ET Updated Jan 17, 2015

10-Year Journey Of Deepening Radicalism Turned Paris Brothers Into Hardened Killers

Handout via Getty Images

In the year after the United States’ invasion of Iraq, a 22-year-old pizza delivery man here couldn’t take it anymore. Sickened by images of American soldiers humiliating Muslims at the Abu Ghraib prison, he made plans to go fight United States forces. He studied a virtual AK-47 on a website. Then he took lessons from a man, using a hand-drawn picture of a gun.

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