Are Americans Like Douglas McAuthur McCain a Threat to America?

The startling news that an American, Douglas McAuthur McCain, died fighting with extremist Islamist rebels in Syria again raises concerns that the Obama administration has sounded for months — that Americans could come back home hardened by conflict in Iraq and Syria and trained to launch terrorist attacks on their own homeland...

http://www.nbcnews.com/news/us-news/are-americans-douglas-mcauthur-mccain-threat-america-n189726