The wild hunt for the suspects in the Boston marathon bombings is over. Following the crazy chain of events from 3,070 miles away, my concern was more about America's continued loss of innocence. When you discover that schools and sporting events are not safe from deranged minds, you learn to adjust your definition of safe. Some wonder how to protect a sporting event that covers 26.2 miles and includes thousands of people. I don't think you can. You must assume, until proven otherwise, that marathons and distance running are still safe activities. Don't fear dying from a terrorist attack while running a marathon, do fear dying if you don't run or do some other exercise, my recent column argues.