Bolt targets 'triple triple' glory in Rio

Usain Bolt aims for an unprecedented "triple triple" of Olympic athletics golds here Friday as Jamaica aims to seal their sprinting supremacy on the track. Bolt will complete a third straight sweep of the Olympic sprint medals if Jamaica win the 4x100m relay on Friday, following Thursday's win in the 200m. Jamaica's women are also chasing a sweep in the same events, with 100m and 200m champion Elaine Thompson expected to anchor her team in the women's 4x100m relay.