Crain's Daily Gist

There’s been a dramatic uptick in violent incidents on flights, with airlines reporting 3,000 cases of disruptive passengers since Jan. 1. Reporter John Pletz joins host Amy Guth to discuss how carriers are responding. Plus: Kellogg CEO's Chicago address shows a company’s “headquarters" doesn't mean what it used to; CVS/Aetna combo targets Illinois in a new threat to Walgreens and Blue Cross; historic sites group breaks ranks with state officials over Thompson Center; and a Lake Shore Drive name change has been approved by City Council.