It is hard to understand that some humans in our midst are so fanatical, that they don't have a conscience, and can deliberately cause so much chaos, and pain. This event is a national tragedy, just as 9/11, Benghazi, and other attacks over the years; no matter how many died/injured. An attack on America is heartbreaking, and shocking to all of us, that consider ourselves Americans. We are the most benevolent country in the world, but, at the same time, so many hate us. We have to ask why? Prayers to all affected by this horrible event. So terribly sad.