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L. Ron Hubbard (1911 - 1986), writer of science fiction and founder of the Church of Scientology, outside his Sussex mansion, Saint Hill Manor, with his family, December 1959. From left to right, Suzette, wife Mary Sue Hubbard, Quentin, Arthur, Hubbard and Diana. The potted plants are being used for Hubbard's experiments into the emotional sensitivity of flora. (Photo by Chris Ware/Keystone Features/Getty Images)

L. Ron Hubbard (1911 - 1986), writer of science fiction and founder of the Church of Scientology, outside his Sussex mansion, Saint Hill Manor, with his family, December 1959. From left to right, Suzette, wife Mary Sue Hubbard, Quentin, Arthur, Hubbard and Diana. The potted plants are being used for Hubbard's experiments into the emotional sensitivity of flora. (Photo by Chris Ware/Keystone Features/Getty Images)

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Mother watching daughter say bedtime prayers

Mother watching daughter say bedtime prayers

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American evangelist Billy Graham embraces his family upon his return from his 'Crusade for Christ' tour, New York, New York, mid 1950s. Clockwise from left: Chinese-born wife Ruth, daughter Anne, Graham, daughter Ruth (Bunny), and daughter Virginia.

American evangelist Billy Graham embraces his family upon his return from his 'Crusade for Christ' tour, New York, New York, mid 1950s. Clockwise from left: Chinese-born wife Ruth, daughter Anne, Graham, daughter Ruth (Bunny), and daughter Virginia.

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American civil rights leader and minister, the Reverend Martin Luther King Jr. (1929 - 1968) in his vestments as pastor of the Dexter Avenue Baptist Church in Montgomery, Alabama, mid 1950s. (Photo by New York Times Co./Getty Images)

American civil rights leader and minister, the Reverend Martin Luther King Jr. (1929 - 1968) in his vestments as pastor of the Dexter Avenue Baptist Church in Montgomery, Alabama, mid 1950s. (Photo by New York Times Co./Getty Images)