That is a sad photo. Most of those in the blast radius died a slow, agonizing death due to shock, exsanguination, collapsed lungs, or will die tonight from blood clots from blast injuries.
Damn bastards!
Scroll down to #8; take a deep breath:
http://www.theatlantic.com/infocus/2013/04/photos-of-the-boston-marathon-bombing/100495/