Federal authorities are investigating five construction companies that collectively have gotten hundreds of millions of dollars in construction work at O'Hare Airport under Mayor Daley, the Chicago Sun-Times has learned.
One question being looked at, sources said, is how the companies landed those city deals.
The investigation appears to be an outgrowth of the probe of former Gov. Rod Blagojevich, whose fund-raiser Christopher G. Kelly was a top roofing contractor at O'Hare. Kelly worked at O'Hare when John Harris was a top city aviation official. Harris, who later became Blagojevich's chief of staff, was arrested with Blagojevich on Dec. 9 on federal corruption charges.