Introduction: Understanding terrorism -- PART 1. THE NINETEENTH CENTURY: "A sight which can never be forgotten": the Mountain Meadows Massacre (1857) ; "The gentle, kindhearted bioterrorist": Luke Pryor Blackburn and the Yellow Fever Plot (1864-1865) ; "We may suspect that race was the cause of the hostility": the Colfax Massacre (1873) -- PART 2. THE MODERN ERA: "The McNamaras have betrayed labor": the Los Angeles Times bombing (1910) ; "An explosion just like the sound of a Gatling gun": the Wall Street bombing (1920) ; "A President has to expect these things": the Truman assassination attempt (1950) ; "The Klan is back on the market": the Sixteenth Street bombing and the Civil Rights Movement (1963) ; "You don't need a Weatherman to know which way the wind blows": Weatherman and Counterculture Movement (1960s) -- PART 3. POSTMODERN TERROR: "A revolution against the industrial system": the Unabomber (1970s-1990s) ; "How charged with punishments the Scroll": the Oklahoma City bombing (1995) ; "There is a bomb in Centennial Park; you have thirty minutes": Eric Robert Rudolph (late 1990s) ; "The system was blinking red": the Radical Islamic Movement and the September 11 attacks -- PART 4. CONCLUSION: The lessons of terrorism