Plot: 2013/04/11 Headlines: Tens of Thousands Rally for Humane Immigration Reform; Senate Immigration Plan Sets Cumbersome Border Requirements; Obama Budget Plan Endorses Social Security Cuts; Petition Opposing Chained CPI Draws 2. 3 Million Signatures; Senate to Hold First Gun-Control Vote After Compromise on Background Checks; Michelle Obama Pushes Gun-Control Vote; Rhode Island Introduces Gun-Control Measure; Military Court Raises Burden for Manning Prosecutors; Internet, Phone Access Curbed; HRW: Over 4,300 Civilians Killed in Syrian Strikes; U