I guess it was the big plane crash picture [why Warhol started his 'Death'-series], the front page of a newspaper: '129 DIED'. I was also painting the Marilyns [the Marylin Monroe portraits, Warhol started after her tragic death in 1962] I realized that everything I was doing must have been death. It was Christmas or Labor Day - a holiday - and very time that you turned on the radio they said something like '4 millions are going to die'. That started it. But when you see I gruesome picture over and over again, it doesn't really have any effect.

pp. 116-19 - What Is Pop Art? Interviews with Eight Painters, Part 1 (1963)