The May issue of The Throwback, my monthly history-themed e-newsletter, includes a look at how pandemics of the past created the cities of the present, a kamikaze attack on a WWII hospital ship, and perhaps the most bizarre incident in presidential history. There are also recommendations of a book on the Kent State shootings, a documentary on the last days of the Vietnam War, and a new history podcast from presidential historian Jon Meacham. Click here to read.