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The Baltimore Sun

Margaret Thatcher

Regarded by many as the country's most important peacetime leader of the 20th century, Thatcher transformed Britain with a conservative free-market revolution. The 'Iron Lady' was known as much for her formidable persona as her polarizing policies. She was 87. Full obituaryPhotos: Margaret Thatcher | 1925 - 2013 Notable deaths of 2012Johnny Eggitt / AFP/Getty Images