Super-duper high speed photography (we're talking 1- ten millionth of a sec) of the birth of a Hiroshima size atomic blast. Top photo the fireball is a couple hundred feet across still vaporinzing the tall tower it was mounted on. Second photo the fireball is expanding and beginning to touch the desert floor of the Nevada test site. Not sure if these are from the same 'shot'. Sometime in the 1950's.
Doc Edgerton who founded EG&G is the father of the high powered studio stobe lights that I have used all my career as a fashion photographer.