Take a look at a newborn baby's tiny fist. Now imagine the fist is a heart -- they're about the same size -- and a surgeon must operate on it. It's incredibly risky business. For the most complex types of children's heart surgeries, one out of five patients will die.
She was only 7 weeks old, weighed a mere 10 pounds, and had just had delicate surgery to widen a narrowing in her aorta, the vessel that carries blood from the heart to the rest of the body. If that wasn't enough, after the surgery, Layla McCarthy stopped moving her legs. The doctors couldn't explain why.
When Richard Norris from Virginia received a face transplant three years ago, it transformed his life. Now the sister of the man whose death made that possible has come face-to-face with Norris for the first time.