Summary: Headlines for April 16, 2013; Boston Marathon a "Horrifying Scene" After Twin Blasts Kill 3 and Leave Scores Maimed, Wounded; Peace Activist Carlos Arredondo Hailed as Hero for Aid to Boston Marathon Bombing Victims; "Like a War Scene": From the Streets to Hospitals, Witnesses & Medics Rushed to Help Bombing Victims; Sportswriter Dave Zirin: Prayers For the People in Boston, Baghdad and Mogadishu; "Mother Teresa of Somalia" Hawa Abdi and Daughter Deqo Mohamed on Healing Decades of War, Tragedy
