On GPS Sunday, reality checks on the two biggest foreign policy debates on the 2016 Presidential campaign trail. First up, who's to blame for 9/11? Fareeds ask Philip Zelikow, the Executive Director of the 9/11 Commission, and Paul Wolfowitz, Bush's Deputy Defense Secretary. Then, how about Iraq - can you draw a straight line from the 2003 invasion to ISIS? Fareed talks with former UK Prime Minister Tony Blair. And, Ben Bernanke on bringing the global economy back from the brink when he was the Chair of the Federal Reserve. Finally, Dilma Rousseff, the President of ...