erin burnett "outfront" starts right now. thank you. next, new details about the gunman who terrorized a maryland mall this weekend. what he wrote in his journal and what a friend says he planned to do today. plus, hillary clinton reveals her biggest regret as secretary of state and starts to distance herself from president obama. and why are some people calling the grammys racist? let's go "outfront." good evening, everyone. thanks so much for joining us. i'm don lemon in for erin burnett. tonight, what made a maryland teenager open fire at a mall this weekend terrorizing employees and customers? we're learning more tonight about 19-year-old darren aguilar who shot and killed two