Five design teams have been picked as finalists for the $8.5-billion revamp of Chicago's O'Hare International Airport. They are Fentress-EXP-Brook-Garza Joint Venture Partners; Foster Epstein Moreno JV Joint Venture Partners; Santiago Calatrava LLC; Skidmore, Owings, & Merrill (SOM); and Studio ORD Joint Venture Partners.