Friday, Nov. 4 — I watched a friend run the Detroit Marathon a few weeks ago with friends. We set up camp at the 8.5-mile mark. Our friend greeted us, having completed a third of her distance, with an energetic smile and a hug for everyone. After this, we went to mile 26 to watch the first runners come in. It was thrilling to see the leaders finish, and I imagined the pride they must be feeling. After watching the first five runners make the final turn, we went to the halfway mark to cheer our friend. She greeted us with the same exuberance, looking as if she could run all day.