Opinion piece in HSToday by Richard Serino: A 10-Year Reflection on the Boston Marathon Bombing and a Call for a National Emergency Management Strategy.
An excerpt:

While nothing can replace those we lost, as a community we take solace that our preparedness saved lives. I often say: It was no accident that Boston was prepared to respond that day, it was no accident that equipment was on site. It was no accident that the patients were equally distributed across hospitals. It was no accident to see that lives were saved with tourniquets. Boston was strong because Boston was prepared.