I have had a couple beam and diets but I have been thinking about something. I used to run half marathons, I was slow but I could tell you within ten minutes when I would probably finish. I wonder if someone was running a certain pace, someone knew it, and this was a plot to take them out? Or maybe a group running. That would explain the 100yrds apart, 2 chances at the same person? Could have even been detonated when the runner passed a certain point. adn the other IED distractors. There are a lot of people all over that world that run the Boston.