Now he is looking for A 7734: The number of his identical twin brother.

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Krok, along with his identical twin brother Solly Krok, made his first fortune selling skin-lightening creams during the apartheid era.

FORBES: South African Centimillionaire Abe Krok Dies

Space station commander Scott Kelly, whose identical twin brother Mark Kelly is married to Giffords and is also an astronaut, led NASA in a moment of silence Monday as part of the national observance for all the victims of Saturday's shooting.

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