Host Art Cohen takes a closer look at today’s top stories.  Boston Rally, WBZ’s Carl Stevens.  Americans Buying Their Food At Walmart, Bloomberg Business’s Adriane Mitchell.  Fight Supremacy Press Conference, WBZ’s Ben Parker.  Spain Terror Attacks, CBS’s Sabina Castelfranco.  Bruins Contract, WBZ’s Adam Kaufman.  The Eclipse, WBZ TV Meteorologist Barry Burbank.  Bull On The Loose, WBZ’s Karyn Regal.