There are some neighborhoods in LA and Chicago that are worse.
Agreed. I wonder if something like this would have happened at least once if The One had gotten his Olympic games in Chicago.
Yup. But while the USA has some awful urban crime (especially in our worst 10-15 cities), for murder rates worldwide, Brazil has 21 of the “top 50” cities (Rio doesn’t quite make the list at 18.6 homicides per 100,000):
https://en.wikipedia.org/wiki/List_of_cities_by_murder_rate