RIO DE JANEIRO (AP) — Usain Bolt is leaving and insists he's not coming back.
How will track and field ever be the same?
The departure of the sport's most electric athlete from the Olympics certainly makes the Tokyo Games feel like a less enticing prospect.
That's hardly the only issue track and field faces as it tries to clean up its act and find some new headliners before 2020.
A look at what the sport might look like — needs to look like? — four years from now.
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SPRINT GAME
Somebody will have to claim center stage in the marquee events, the men's sprints.