You fall back on your training. It's a powerful feeling knowing how to calmly make good decisions in the middle of something horrible.

Some will say you get used to it. I don't. I compartmentalize during and feel after. And we have an excellent CISD (critical incident stress debriefing) program for after-care where I work. I kind of think if you get so used to the horror that you cannot be empathetic, it's time to quit.