The Boston Marathon is a 26.2-mile race. But for a Marine, the last 100 yards were the toughest. Don.
9/11 Changed Marine's Life Forever
Master Sgt. Jason Velez remembers the events on September 11, 2001. He evacuated his building and helped first responders by barricading the streets and pushing civilians away from ground zero. He says the scenes he witnessed that day changed his life. Interviews by: Staff Sgt. Jennifer Brofer, Sgt. Heidi Agostini -- Photos courtesy of the U.S. Marine Corps and U.S. Navy