Presidents Go To Meet God

So, one day, God gives special consideration and let 3 world leaders visit him.

After many things, Australian president ask: when can people of Australia live in complete harmony? God: in 50 years. So, president becomes sad, says: I can't wish to live that long. Second comes, UK PM. He ask the same question at some point as well. God: in 100 years. PM: I can't wish to live that long.

3rd comes US President. President: when can people of USA live in complete harmony? God: I can't wish to live that long.