Overview: Headlines for April 07, 2016; A Torturer's Confession: Former Abu Ghraib Interrogator Speaks Out; Ex-Abu Ghraib Interrogator: Israelis Trained U.S. to Use 'Palestinian Chair' Torture Device; Former Abu Ghraib Interrogator: Because of Trump & Cruz, Door Still 'Wide Open' for U.S. to Torture; Melissa Harris-Perry on Race, Media, and the Story Behind This Year's Presidential Race