Professor and Vice Dean for Education at Johns Hopkins Carey Business School. Ran Boston Marathon and is running half marathon in Baltimore. "We're riding back on the [metro] and somebody says, 'There's been an explosion near the finish line.' I can tell you, you've never seen so many people whip their cell phones out more quickly and start looking, whether it was Twitter or CNN or whatever, just to get some idea of what had been happening." "A lot of the reaction afterward was that this was the wrong group to mess with. Especially marathon runners. Marathon runners are people who don¿t give up easily, who aren't deterred by things, no matter what their friends or family say. It's kind of like, if you mess with our sport, even more of us will [run]."