2015/04/06 Headlines: Kenya Hits Al-Shabab in Somalia after Garissa Massacre; Obama Seeks Public, Congressional Backing of "Robust and Verifiable" Iran Deal; U.S., Iran Differ on Pace on Sanctions Relief under Final Deal; Netanyahu Campaigns Against "Historically Bad" Iran Deal; Red Cross Seeks Fighting Pause in Yemen as Civilian Toll Mounts; U.N.: "Grave and Desperate" Crisis inside Palestinian Refugee Camp under ISIS Control; Rolling Stone Retracts University of Virginia Rape Story after Probe Finds Errors; Relatives of Missing Mexico Students Continue U.S. Protests