As a physician, my focus is how to heal wounds rather than how to cause wounds. A terrorist, however, has quite different goals. Normally, they have a short window of opportunity, and their focus is to cause as many casualties as possible during their brief (hopefully) remaining time on Earth.
I’ve been asked quite a bit lately about what to do in active shooter situations. My standard answer has been the same as that given by the Department of Homeland Security: Run, Hide, Fight, in that order.