More than 25,000 foreigners including more than 250 Americans have flocked to war-torn Syria and Iraq since 2011 to fight with Islamist terrorist groups including ISIS, according to U.S. government. “To disrupt the flow of foreign terrorist fighters” in which was called “the largest global convergence of jihadists in history” remains an important goal for America.” U.S. officials caught just 28 Americans before they could jpin ISIS. The flow of foreign fighters is continuing to fuel the conflict in Iraq and Syria. ISIS’s force currently consists of between 20,000 and 30,000 fighters according to the latest CIA estimate. Today we are going to focus how we can do more together,” President Obama said Tuesday at the UN General Assembly.