Former NFL player Devon Still and his daughter Leah on "survivor's remorse" after battling cancer, and how they're helping other kids

Former NFL player Devon Still was always tough on the field, but when his daughter Leah was diagnosed with cancer at 4 years old, he had to hone a different kind of toughness. Devon and Leah gained widespread attention for sharing their journey on social media, and after more than a year of treatment, Leah went into remission. 

But many children don't make it that far, and the Stills felt a sense of "survivor's remorse" that motivated them to help others.  Devon Still was a defensive end for the Bengals when Leah was diagnosed with stage 4 neuroblastoma in 2014. In an interview with CBS News ahead of September's Childhood Cancer Awareness Month, both Devon and Leah said fighting cancer can be lonely and isolating.