A civil war in the US. Possible, but not probable. What are most people going to do: throw rocks at tanks? Sure there are certain non-government groups that have the ability to protect themselves (Michigan Militia comes to mind), but your average citizen would be whipped out in a second if they ever had enough time to organize themselves.
People have grown too attached to their things for them to do what would be needed to be done in order to stage an uprising. Capitalizm has made us
meek; it controls us and the government will use that to their advantage.
When the sh1t hits the fan, will you be ready to do what needs to be done?