Wow, some days are tough to get through as a public broadcaster. This was one of them.
However, I have found some things about the Boston tragedy that have helped me through it. Primarily, a post on Facebook by comedian Patton Oswalt, "We would not be here if humanity were inherently evil. We'd have eaten ourselves alive long ago. So when you spot violence, or bigotry, or intolerance or fear, hatred or ignorance, just look it in the eye and think, "The good outnumber you, and we always will."