5.24.13: Freedom is a Hammer, Richard Huganir at The Stoop, ‘Calvert the Raven in the Battle of Baltimore’

Summary: 5.24 & 5.25 on The Signal: the conservative folk music anthology, “Freedom is a Hammer”; neuroscientist Richard Huganir at The Stoop; and Jonathon Scott Fuqua’s children’s book, “Calvert the Raven in the Battle of Baltimore.”