Horizon S2000E01 - Breath of Life

Sheila Loughran has cystic fibrosis. This leaves her brother and sister, Damian and Josephine, with a terrible choice. Do they watch her die, or do they try to save her by donating part of their own lungs, a dangerous procedure that, at best, will leave them maimed? The harrowing decisions facing the siblings highlight the debate over the ethics of living donor transplants.