The Boston Marathon Bombings and the Cloud of Uncertainty

Nobody yet knows if the Boston Marathon bombing was the work of al Qaeda, a right-wing militia, a deranged individual or somebody we haven't yet thought of. We hear from the President's emotion memorial speech today and talk with a variety of people with different ways of thinking about the tragedy from different perspectives. Also, picking up the pieces in West, Texas after a fertilizer plant explosion. On Reporter's Notebook, the defeat of gun control and the President's second term agenda.

Banner image: Aftermath of the 2013 boston marathon bombing show people helping others from the scene, April 15, 2013. Photo by hahatango