Plus, what's so hard about building trains? On Today’s Episode:Trade War Sets Off ‘Max Pessimism’ in Global Markets as Stocks Plunge, by Joe Rennison, Danielle Kaye, River Akira Davis and Eshe NelsonGrocery Shoppers Will Feel the Tariffs First in the Produce Aisle, by Kim SeversonTrump Fires 6 N.S.C. Officials After Oval Office Meeting With Laura Loomer, by Maggie Haberman, Jonathan Swan and Ken BensingerSenate Confirms Dr. Oz to Oversee Medicare and Medicaid, by Reed Abelson and Susanne CraigTrump’s Not-So-Subtle Purpose in Fighting Big Law Firms, by David EnrichWhat’s So Hard About Building Trains?, by Michael KimmelmanTune in every weekday morning. To get our full audio journalism and storytelling experience, download the New York Times Audio app — available to Times news subscribers on iOS — and sign up for our weekly newsletter.Tell us what you think at: theheadlines@nytimes.com.  Subscribe today at nytimes.com/podcasts or on Apple Podcasts and Spotify. You can also subscribe via your favorite podcast app here https://www.nytimes.com/activate-access/audio?source=podcatcher. For more podcasts and narrated articles, download The New York Times app at nytimes.com/app.