Bombing of Hiroshima
Damage by the Heat Rays
Black fingernails
Yoshio Hamada, then 26, was exposed to the bomb in his barracks 900 meters from thehypocenter. His left hand was on the windowsill when the bomb exploded, and themiddle and fourth finger on his left hand, which were exposed directly to the heat rays,were burned so badly that the skin and nail peeled and hung from his finger tips. He lostabout one centimeter off the ends, and ever after, strange rod-shaped black nails likethese grew directly from the skin at the end of those fingers. These nails, unlike normalfingernails, contained active blood vessels. When the nails broke, large amounts ofblood poured out. And after a nail broke off, the same sort of nail continued to grow. 
http://www.pcf.city.hiroshima.jp/outline/index.php?l=E&id=34

Bombing of Hiroshima

Damage by the Heat Rays

Black fingernails

Yoshio Hamada, then 26, was exposed to the bomb in his barracks 900 meters from thehypocenter. His left hand was on the windowsill when the bomb exploded, and themiddle and fourth finger on his left hand, which were exposed directly to the heat rays,were burned so badly that the skin and nail peeled and hung from his finger tips. He lostabout one centimeter off the ends, and ever after, strange rod-shaped black nails likethese grew directly from the skin at the end of those fingers. These nails, unlike normalfingernails, contained active blood vessels. When the nails broke, large amounts ofblood poured out. And after a nail broke off, the same sort of nail continued to grow. 

http://www.pcf.city.hiroshima.jp/outline/index.php?l=E&id=34

Muhammad Ali letting a young fan win a fight, 1963.

Muhammad Ali letting a young fan win a fight, 1963.