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Prime minister Margaret Thatcher of Britain rode down Downing Street in London at the start of her third term in office.
Chris Ware/Keystone Features/Getty Images/File 1950
Miss Margaret Roberts worked as a research chemist in 1950.
Thatcher waved as she arrived to take office at 10 Downing Street in London with her husband, Denis.
JOHNNY EGGITT/AFP/Getty Images/File 1989
Thatcher, known as the "Iron Lady" who shaped a generation of British politics, died following a stroke on April 8, 2013.
Thatcher posed with Mikhail Gorbachev in London in 1984.
J. Scott Applewhite/AP/File 1985
Thatcher met with her friend and political ally President Ronald Reagan during a visit to the White House in 1985.
CHRIS SCHWARZ/The Canadian Press/AP File/1984
Thatcher was greeted by Canadian Prime Minister Pierre Trudeau outside 10 Downing Street in London in 1984.
LEON NEAL/AFP/Getty Images/File 2010
Thatcher waving to photographers as she stood with Prime Minister David Cameron in 2010.