A photographer has revealed the little-known story behind the iconic image of Marilyn Monroe standing on a New York subway grate with the air from below lifting her skirt. After Shaw’s death, his family uncovered a collection of previously unseen photographs and letters between him and Monroe. These are featured in the book Dear Marilyn: The Unseen Letters and Photographs. The image of Monroe used for the movie’s ads was later reshot in a Los Angeles studio by Shaw. Shaw photographed Monroe after the film crews had finished and also captured the man operating the wind machine beneath the grate.