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In 1967, the American athlete Kathrine Switzer, became the first woman to run the Boston Marathon.

At the time, athletics officials believed women were incapable of running more than a mile and a half.

After crossing the finishing line, Switzer was disqualified.

It was an experience that turned her into a campaigner for women's sport.

Picture: A Boston Marathon official attempts to stop Katherine Switzer, Credit: Associated Press