Dave Davies

The First World War, which lasted from 1914 until 1918, ushered in a new kind of mechanized warfare. Bodies were maimed, burned and gassed, and as many as 280,000 combatants were left with ghastly facial injuries. Medical historian Lindsey Fitzharris says soldiers who suffered facial injuries were often shunned in civilian life.

Rafael Agustin arrived at the age of 7 in the U.S. with his parents from Ecuador. It wasn't until years later that he realized that his family immigrated to the country illegally.

Pediatric neurosurgeon Jay Wellons regularly feels the exhilaration of saving a child from near certain death — and sometimes the anguish of failing to prevent it.