The US Homeland Security Chief is concerned about Americans who have fought in Syria and are now back home. Jeh Johnson says the issue has become an issue of homeland security. He added that law enforcement and security forces across the world are focused on foreign nationals Heading to Syria including those from the US, Canada and Europe. Western officials are concerned that their nationals fighting the Syrian government become even more radical after joining other insurgents. US authorities have confirmed that militants from some fifty countries are in Syria fighting the government there. Damascus says some western and regional countries are facilitating insurgent infiltration into the country. Show Less >>