The American men and women swept golds in the 4×400 relays, the last races of a dominant Olympics for US track and field

The American men and women swept golds in the 4×400 relays, the last races of a dominant Olympics for US track and field

​The American men and women swept golds in the 4×400 relays, the last races of a dominant Olympics for US track and field The American men and women swept golds in the 4×400 relays, the last races of a dominant Olympics for US track and field US