Starting a bone marrow registry in Nigeria "became an obsession" for Seun Adebiyi. "I thought that even if I couldn't find a match, I wanted to make it easier for other black patients to find a match." Seun Adebiyi hide caption

itoggle caption Seun Adebiyi

A surgical team performs a full face transplant on Charla Nash at the Brigham and Women's Hospital in Boston. Lightchaser Photography hide caption

itoggle caption Lightchaser Photography