Confusion surrounds many Russian athletes in Rio, whose status to compete in the Olympics remains unclear. Individual sports federations are trying to determine who's eligible to compete with only days left before the games begin. Some athletes have appealed their suspensions.
The Jamaican six-time Olympic gold medalist may display the ultimate in speed when it comes to the 100-meter and 200-meter events, but, his agent says, "Usain has never run a mile."
The rush of victory or crush of defeat in the Olympics can flash by very quickly. But if you slow those moments down, there's a lot to learn about human behavior.
American women are expected to dominate team sports at the Olympics. That includes water polo, where they are defending champions and have medaled every time since the sport was introduced in 2000.
First, the Australian team's move-in was delayed. Then they had to evacuate because of a fire in their building. Now their delegation head says several items were stolen after they fled from the fire.
If Rio goes well for her, Olympic shooter Kim Rhode could become the first person to medal in six consecutive Summer Games. But Rhode is looking beyond the personal accolades.