Overview: Headlines for April 25, 2016; 'Horrified': Seymour Hersh Reacts to Obama's Plan to Send 250 More U.S. Special Ops Troops to Syria; Seymour Hersh Weighs In on Sanders vs. Clinton: 'Something Amazing Is Happening in This Country'; Is the Obama Admin Ignoring the Role of Turkey & Saudi Arabia in Syria's 2013 Sarin Gas Attacks; Sy Hersh's Book on Bin Laden Killing Rejects U.S. Story, Says Saudis Financed Hiding of Qaeda Leader