In this episode, Niki, Natalia, and Neil discuss Rudy Giuliani's political career, the climate activist Greta Thunberg, and the controversy over vaping.

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Here are some links and references mentioned during this week's show:

• Rudy Giuliani is most prominent today as a Trump surrogate, but after 9/11 he was known as "America's Mayor." Natalia recommended Ken Frydman's New York Times op-ed about working for Giuliani and Matthew Yglesias' Vox piece about his disregard for the rule of law.
• Scandinavian climate activist Greta Thunberg is inspiring a fierce response across the political spectrum. Natalia recommended Rebecca Onion's piece at Slate on Thunberg's appeal.
• Vaping has existed for less than five years, but is at the center of intense controversy over its potential health consequences. Niki recommended historian Sarah Milov's new book, The Cigarette: A Political History, and her articles about vaping at Made by History and at Time.

In our regular closing feature, What's Making History:

• Natalia discussed the history of women being dismissed from teaching for visible pregnancy in light of Elizabeth Warren's career.
• Neil talked about the New York Times article, "Samuel Little is Most Prolific Serial Killer in U.S. History, F.B.I. Says."
• Niki shared Moises Velasquez-Manoff's New York Times article, "As Sea Levels Rise, So Do Ghost Forests."