she never did. the first two of blasts tore apart both of john's legs. when he arrived at bmc, he was technically dead. >> when i had to talk to karen and their whole family right after the surgery, all i wanted to convey that was we were talking minute by minute. >> reporter: dr. jeffrey kalisch and nurse mallory coleman sat alongside john and his wife monday at the hospital that saved his life. [ laughter ] >> reporter: john's legs were spared over the course of 11 operations. one of his legs is paralyzed, but he is walking again. >> when he stood between those parallel bars at spaulding and took five steps, it was a miracle. >> reporter: now the day before the one-year anniversary, john is reflecting on the past 12 months, the tragedy of april 15th and the kindness that followed. >> there's more good people in this world than there are bad people. >> the surviving suspect in the