When Good Morning America correspondent Amy Robach participated in an on-air mammogram last month, she thought that if it saved just one life, it would be worth it. As it turns out, the life she saved was her own. Today on the morning show, the 40-year-old mother and TV personality opened up to viewers at home about her new cancer diagnosis, saying, "It was just six weeks ago that pink took over GMA. I had no idea then, of course, how quickly my life was about to change." Originally, Amy had the mammogram to help demystify the process for women who might be nervous, and it looks as though she'll have a chance to help raise awareness even more about breast cancer as she continues to share her experiences. Watch the video above to see the mammogram that saved Amy's life and hear how she's taking on cancer.