3 Missing Teenage Girls Now In Syria, British Police Say
The London teenagers boarded a flight to Istanbul on Feb. 17. Police believe the girls traveled to Syria hoping to join up with militants from the so-called Islamic State.
Islamist fighters
From German Teen To ISIS Jihadist: A Father's Struggle To Understand
Manfred Karg's 19-year-old son, a convert to Islam, is one of at least 60 Germans killed fighting alongside ISIS militants. Karg says efforts to stop the flow to Syria and Iraq are taking too long.