An informational webinar about the topic of countering misinformation, titled Upholding the Truth: Strategies to Counter Misinformation, is being offered by the Southern Arizona chapter of the Public Relations Society of America on Tues. Sept. 24 at 12 p.m. Featured speaker will be Michael Cherenson, a lead contributor to the playbook “Tackling Misinformation – The Communications Industry Unites,” which was released earlier this year by the Public Relations Society of America. For more information and to register, visit www.prsatucson.org.