I'd heard the remarkable story of Charles Tillman's daughter, Tiana, who received a heart transplant when she was six months old. And I'd attended one of Tillman's events for his Cornerstone Foundation.
But it was powerful television watching Tillman and his wife Jackie meet the mother, who donated her son's heart after she was informed he wouldn't survive.
Tillman said he started to write a letter to the mother, who's name is Magali, but it took him a year to finish it.
"In my words, thank you isn't enough," Tillman said. "I've thought about this day ever since it happened."
It's a moving piece and you can check it out here.