In 1967, Kathrine Switzer became the first woman to officially enter the Boston Marathon – despite attempts to stop her as she ran. "I knew I had to finish the race, because no one would believe women could do it unless I did,” Switzer said. “I had to finish the race no matter what."
50 years later, Switzer is returning to Boston to run the marathon one more time. She's proudly wearing the same bib number, 261, that an official tried to tear from her shirt on that historic day. #LeanIn