The American Killed Fighting With ISIS Had A Childhood Best Friend Who Joined An Al Qaeda Affiliate

Douglas McCain, a Minnesotan who had been killed fighting alongside ISIS, was childhood best friends with another American who had joined an al Qaeda-linked terror group fighting in Somalia.  One of McCain's closest childhood friends was Troy Kastigar. Over a decade ago, Kastigar and McCain had shared an address, and the two graduated together from Robbinsdale Cooper High School in New Hope, Minnesota, in 1999.   Kastigar's story foreshadows McCain's own future radicalization and involvement...