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."