Mayor Richard Daley's decision to shut down Meigs Field meant that Marine One had to land in Grant Park.
In the past, the president usually took his helicopter from O'Hare International Airport to Meigs to get downtown.
Bush expects to be in Chicago for less than three hours to discuss limits on medical malpractice awards and his plan to provide prescription drug coverage under Medicare.
He's scheduled to meet with a group of senior citizens and doctors before speaking at the Illinois State Medical Society.
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