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Pope Benedict XVI greets former British Prime Minister Margaret Thatcher during his weekly audience in 2009 in St. Peter’s Square at the Vatican. Thatcher, a major figure in British and world politics and the only woman to become British prime minister, died April 8 at the age of 87. (Credit: CNS photo/L’Osservatore Romano via Reuters)

Pope Benedict XVI greets former British Prime Minister Margaret Thatcher during his weekly audience in 2009 in St. Peter's Square at the Vatican. Thatcher, a major figure in British and world politics and the only woman to become British prime minister, died April 8 at the age of 87. (Credit: CNS photo/L'Osservatore Romano via Reuters)