Scenario: Americapolis

Americapolis is the largest and the most populated city in the world. It declared independence from the U.S.A. in 2055. Its population is 145,000,000 people, but with its metropolitan zone it has 300,000,000 people.

History
The 2008 financial crisis hit the most of the U.S. In 2020, U.S.A and New York had economically fallen. Milions of people came to St.Louis for finding a new job (because St.Louis economy was stabilized in 2015). New buildings appeared in the former ruined city and so Americapolis was born