Hindsight is 20-20 and examining events from the perspective of what could have or should have happened is usually an exercise in futility.Except when the stakes are high and the path that wasn't taken could have altered our current history.We've known for years that the CIA was urging President Obama to arm the largely secular Free Syrian Army in 2012 to give them a chance to overthrow President Bashar Assad of Syria. This was before Syria's use of chemical weapons, before the Islamic State broke away from al-Qaeda, and before the refugee situation that led to a mass exodus from...