Channel 4: Why is Iran involved in a proxy war in Syria? And what's the cost? We explain how and why the country has recruited an army of its own people to help prop up President Assad. The Saudis and Americans accuse Iran of “state-sponsored terrorism” for its support for the Shia-dominated regime of President Assad in Syria. And the Americans have confirmed that they had carried out an air strike against pro-government militia there, it is believed for the first time. Subscribe for more: