The world's top sprinters enter the equation later Saturday, with the United States, who have won more golds in the event than all other nations combined, determined to take Bolt's mantle and regain their supremacy.
Ku wa Gatandatu, abasiganwa n'amaguru ku isi batangiye ikiciro cya nyuma muri Amerika, hmAmerika ni yo yabonye igikombe cya zahabu muri ibyo birori kurusha ibindi bihugu byose byari byarushanyijwe, niyo yabaye iya mbere yambikwa ikamba i Bolt