Two bombs explode in the crowded streets near the finish line of the Boston Marathon. Three people are killed, including an 8-year-old watching his father run, and more than 130 are injured. But there are thousands who will leave the race with post-traumatic stress symptoms. Although not all will develop what we define today as Post-traumatic Stress Disorder, an understanding of PTSD is crucial these days with the increase in terrorist attacks and mass shootings in this country.
Here are five things you should know.