to see, despite what she's been through. >> just five months ago, mary was rushed to the hospital, severely injured in the boston bombings. her heart stopped twice while doctors amputated her left leg. >> it's amazing to see from seeing her first in the hospital bed only a few days after the marathon to now, to seeing people do this thing. where i it's incredible. >> in a show of solidarity, she wroed 26 miles in the ride to recovery with wounded veterans. >> i think we share a common link in life right now because a lot of them are -- they have injuries that are similar to mine. >> even more, get your weight over there. >> relearning to walk has been daunting. >> it's extremely difficult. sometimes i don't even want to get out of the bed because putting the leg on, i didn't feel like i could put it on. but you know, they have to force you to do what you have to do. that's how you're going to progress. >> helping in her recovery,