These Boston Marathon Survivors Define Strength and Perseverance

Boston Marathon bombing survivor Heather Abbott is making strides in her recovery day by day. It hasn't been an easy road, and she's opened up about life's challenges, saying: "Sometimes it's just hard. Everything is more difficult now. I have to think about things I never had to before." Still, Heather is back working part time in human resources, and less than four months after getting a prosthetic leg, she went paddleboarding. The 39-year-old says she's been surprised by own strength, adding, "I'm much stronger and more resilient than I ever could have imagined."