Summary: An animated, online map shows for the first time just how the Ku Klux Klan spread rapidly to all 50 states between 1915 and 1940. John Kneebone says the KKK was far more main-stream than most people realize, with membership of between 2 million and 8 million people. Plus: Revolution has been one of the most important drivers of human activity since its emergence in modern form in the 18th century. In his new book, Jack Censer traces the “evolution of revolutionary ideas”--from the American and French revolutionaries to leaders of the Arab Spring. Later in the show: Many displaced Iraqis returning to their homes are finding landmines and booby-traps left for them by ISIS fighters. One woman opened her refrigerator and found a landmine on her vegetable shelf. Ken Rutherford who co-founded the Landmine Survivors Network, says this is the first time in the world’s history that roadside bombs target civilians.
