> People in the US are able to freely travel between states, this isn't the case elsewhere in the world. Do you know of countries with a federal government and

> People in the US are able to freely travel between states, this isn't the case elsewhere in the world. Do you know of countries with a federal government and where people can't travel freely between the member states? The ones I know don't have this problem so I'm not sure how that's something unique to the US.