Mccain. He was an american, and he still has family right here in the u. S. In california. But Douglas Mccain met his death far from these shores in war torn syria. A convert to islam who found himself drawn to the jihadist cause. A u. S. Official says the u. S. Believes he was fighting for isis when he died, the terrorist group and he was not alone. Dozens of other americans are believed to have taken a similar path. Theres a real fear that those who escape death, unlike Douglas Mccain, could use their passports to come back to the usa. And kill their fellow americans. Lets bring in our chief National Security correspondent jim sciutto. Jim, how did Douglas Mcarthur mccain end up as a dead ji hattist in syria . Its an incredible story, remarkable down to that allamerican name, Douglas Mcarthur mccain. I spoke with his uncle a short time ago, kenneth. The family is devastated, just as surprised as the country is right now. He gave me a little bit of the sense of the evolution. Mccain w