While Chicago was sleeping, Rush University medical staffers moved into their new state-of-the-art facility.
The morning shift arrived at 5 a.m. Friday ahead of the emergency center's 6 a.m. official opening.
The 830,000-square-foot facility took six years of planning and cost more than $650 million. It's touted for the ability to handle a large-scale emergency and even a bio-terrorist attack.
It's the first of its kind in the United States.
Equipment will be moved Saturday and about 200 current patients will be transferred Sunday.