CNN The Lead With Jake Tapper May 15, 2013 20:23:00
Look back and say why did this happen or just focus on the negative. >> roseann's injuries led to one amputation below the knee. but as she returned home this week, she vowed not to let it slow her down. >> i used to run. i'm hoping at some point through the prosthetic process i'll get back to running at some point. >> reporter: after a long, grueling month, many of the wounded are getting back on their feet. >> i'm a much better person. it's taught me a lot about myself. >> reporter: triathlete nicole gross had been cheering her mom at the marathon when the bombs went off. >> it was just a da...