Chris Sagers, the James A. Thomas Professor of Law, appeared this week on “Air Talk,” a public affairs program on KPCC, a National Public Radio affiliate covering Los Angeles and Southern California with nearly a million listeners. During the segment , Sagers debated Curt Hessler, a lecturer in antitrust and communications at the UCLA School of Law, about the government’s antitrust challenge to the pending merger of AT&T and Time Warner, Inc.