October is Breast Cancer Awareness Month. Breast cancer is the most common cancer diagnosed in American women. Meet a triathlete who's facing the challenge of a lifetime after a dry patch of skin turns out to be an advanced form of breast cancer. While a mammogram didn't uncover Pam's cancer, it still detects a majority of breast cancers at an earlier and more treatable stage. Doctors recommend women speak to their physicians to determine when is best to begin screening.