Although it's a net-downhill race from start to finish, it includes the famous HeartbreakHill, a 650-yard incline at the 21st mile that tests runners' fortitude.
Just like pushing through the pain of conquering the infamous HeartbreakHill at mile 20, Bostonians are resilient and will work together to recover from the tragedy.
Dug his cellphone out of his bag to call his daughter, Sally, who was standing near Mile 21 at HeartbreakHill to watch her dad make the climb for the third time.