Inside Paris La Defense Arena in Nanterre, France, where swimming events are being held, overhead and underwater cameras are used to monitor possible infractions, according to the Olympics ...

Additionally, underwater cameras are put in place to show what action is occurring below the surface to help viewers receive a better understanding of the game. Do Olympic water polo balls float?

But the trump card in the fight against the bad smell was the triple-layered polyester screens, covering up to 5 meters below the sea level, that Olympic organizers set up underwater to stop fecal ...