What exactly happened early Sunday morning in Rio, when four US swimmers say they were robbed at gunpoint? Here's a breakdown of what we know and don't know about the reported robbery -- and what it means for everyone involved. Rio has been trying to rise above a multitude of negative headlines. Starting well ahead of the Olympic Games, the city has been hammered for its dire financial situation, crime, security, pollution and the outbreak of the Zika virus. Not to mention Brazil is in the midst of political upheaval, including Brazil's Senate voting to hold an impeachment trial for suspended President Dilma Rousseff.

Source: CNN August 18, 2016 16:34 UTC