Following the collapse of the Francis Scott Key Bridge in Baltimore, conspiracy theories proliferated. On this week’s On the Media, hear how memes and misinformation obscure the real causes of tragedies, from bridges to planes. Plus, what Ronna McDaniel’s hiring and firing from NBC News tells us about the revolving door from politics to tv news. 1. David Gilbert [@daithaigilbert], reporter for Wired covering disinformation, and Katya Schwenk [@ktyschwnk], reporter at The Lever, on why disasters are fertile ground for conspiracy theories, which obfuscate real quality control issues. Listen. 2. Michael Socolow [@MichaelSocolow], media historian at the University of Maine, on the history of the revolving door between politics and news.Listen. 3. Calvin Trillin, contributor at The New Yorker, on his career and his latest book, The Lede: Dispatches from a Life in the Press. Listen.