I ran across this:
Population peaked. As of 2006, Detroit is the only city in the United States to have a population grow beyond 1 million and then fall below 1 million.

However, I believe Detroit is heading toward another historical mark, that being losing 1 million residents from its high of 1.85 million in 1955. The 2010 census will likely show Detroits population around 850,000.

Which begs the question, what other cities in the world have lost 1 million residents due to things being the same, i.e. no war, no natural distaster.

Please name the cities.