00:00The first woman to run the Boston Marathon, illegally.
00:04In 1967, Catherine Switzer entered the Boston Marathon when women weren't allowed to run it.
00:12She used just her initials to sign up for the iconic race, avoiding detection at first.
00:19Four miles in, furious race official Jock Semple tried to physically shove her off the road.
00:24Her hammer-thrower boyfriend body-blocked Semple, ensuring she continued the historic run.
00:34Catherine finished the race, proving women belonged in marathons, changing sports history forever.
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