What's been the true impact of the US ‘war on terror'?

The US launched its so-called 'war on terror' in the wake of 9/11. Invasions of Afghanistan and Iraq followed with a huge loss of life. Instability spread across many parts of the Middle East. So, what's been the true impact of this so-dubbed war?  Join host Nastasya Tay.Guests: Stephanie Savell - Co-Director of Costs of War Project at Brown University. Ruba Ali Al-Hassani - Postdoctoral Research Fellow at Lancaster University. Michael O'Hanlon - Director of Research in Foreign Policy at the Brookings Institution.