The Boy Next Door

The man in the photo gazes back through the oversized glasses of a computer geek — his wrinkled, discolored collar encircling a thin neck, and his youthful cheeks still looking vulnerable to the occasional adolescent outbreak of acne.

He has the insouciant face of a student, a first-job seeker, of a son and a boy next door. But according to French investigators, the face of Kamel Daoudi is also one of an Islamist radical, Afghan training-camp veteran and member of an al-Qaeda network accused of plotting terrorist attacks in France — including a strike against the U.S....