Silver medalist Luz Long known as first to congratulate Black-American gold medal winner Jesse Owens, who previously said Nazi leader 'must have gone crazy' watching embrace

Germany long jumper Luz Long finished second to African-American Jesse Owens, whose on-field success at 1936 Berlin games shattered Nazi leader's myth of Aryan physical supremacy

Olympic committee says Twitter message part of a series meant to highlight 'message of unity and solidarity' on date marking one year to opening of delayed Tokyo Olympics