Yousuf Karsh was a Canadian photographer of Armenain heritage and arguably the most famous and accomplished portrait photographers of all time.
Karsh’s image of Churchill brought him international promience and is claimed to be the most reproduced and well know photographic portrait in history. The photograph was taken just minutes after Winston Churchill had given a speech to the Canadian House of Commons in Ottawa.
As the story goes, Churchill said, “You’ve got 30 seconds!” In response, Karsh removed Churchill’s signature cigar (without asking) and pressed his shutter release. Hence the displeased look on Churchill’s face.