The NRA's Life of Duty looks at the immediate response to the Boston terror bombing. For those present, it was the most horrific experience of their lives. But one group of men had experienced this sort of thing before, half a world away. It was these men who were seen rushing towards the sound of the blast, putting themselves at risk for the benefit of savings lives.
[Edit. note: "Line of Duty" was corrected to "Life of Duty".]