Madam C.J. Walker, Self-Made Millionaire

Katherine Switzer was the first woman to run the Boston marathon in 1967. Take a look back at her accomplishment and those of other record-breaking female sports stars.

Before the cowboy image Americans know today, former enslaved men became the country's first cowboys who used their skills in ranching to cement their place in the west.

Henry Johnson served in the 369th Infantry Regiment, a unit of the U.S. Army that was composed primarily of African American soldiers and later became known as the "Harlem Hellfighters."

Without their sister, Katharine, the Wright brothers may have never taken flight.