The most globalized city in India, Mumbai is also one of the most populous in the world, with more than 21 million residents.

The most densely populated city in North America is the home of the United Nations and a hub of international finance, art, and entertainment. New York is also a powerful symbol of American culture. The city welcomes immigrants, with more than a third of its population foreign born. And it has successfully dealt with crime--it is the safest large city in the U.S. Though devastated by the terrorist attacks on September 11, 2001, its residents continue their strong recovery.