his long tenure as mayor of Atlanta, serving from 1937 to 1961 and then again from 1961 to 1970. Hartsfield was instrumental in expanding Atlanta's airport, now known as Hartsfield-Jackson Atlanta International Airport, which has become one of the busiest airports in the world. He also played a significant role in promoting civil rights and desegregation in Atlanta during a time of great racial tension in the South. Hartsfield's leadership and progressive policies helped to modernize and transform Atlanta into the vibrant city it is today.