We deeply empathize with the people of Boston in their losses, and we hold in high esteem the people who acted heroically to help the injured following the Monday bombings at the Boston Marathon. Besides these heroes, the only brightness in all of this despair is the detection — and hopefully the eventual identification — of a suspect, enabled by “promising images” from a department store surveillance camera mounted atop a building: http://www.nbcnews.com/video/nightly-news/51575894/#51575894.