Primary Outlet: WLS (Chicago IL)Broadcast Date: Wednesday, April 14, 2021 - 6:35pmProgram: The John Howell ShowBroadcast Type: interviewBroadcast Format: radioScholar: Olson, WalterSubjects: whether businesses can require proof of vaccinationResearch Area: Law and Civil LibertiesLink: https://www.cato.org/multimedia/media-highlights-radio/walter-olson-discusses-wh…