Queen Mother Mary (left) and widowed Queen Elizabeth (right) are shown with Britain's New Queen Elizabeth, in London's Buckingham Palace on Oct. 21, 1950, when young Princess Anne, held by her mother, was christened. Elizabeth became first reigning British Queen in 51 years when her father, King George VI, died at Sandringham on February 6, 1952. The widowed Queen holds Prince Charles, 3, who now becomes first in line to succeed to the throne. Courtesy title of Queen Mother passes to George VI's widow. (AP Photo)