Strangers speedy came to assistance from 11-yr-old Aaron Hern, a California boy severely wounded by using shrapnel from a bomb that exploded whereas he waited to take photos of his mother finishing her first Boston Marathon.“I found him there on the sidewalk with just a few other people who were injured,” his father, Alan Hern, mentioned Wednesday on TODAY. “I may see the wound in his leg. He was scared and obvio…