http://www.cnn.com/2005/TRAVEL/09/30....ap/index.html

"The plan drew intense criticism from some, largely because the 440-acre
expansion requires the city to buy and raze more than 500 homes, displacing
about 2,600 residents, and move nearly 200 businesses and a cemetery with
1,300 tombs dating back to the 1800s.

Mayor Richard M. Daley has long pushed to expand O'Hare, saying it would
speed up air travel throughout the United States. A cost-benefit analysis by
the city projected that the project would save more than $12 billion over
nearly two decades by reducing passenger and aircraft delays.

Critics say the city has exaggerated the project's benefits and
underestimated its cost. In July, the Transportation Department also said
the cost estimate was low."