It seems like a plot from a science fiction or horror movie. The United States transports almost 140 kilograms of one of the world’s most dangerous substances, weapons-grade plutonium, enough material for nearly 20 atomic bombs and numerous dirty bombs, across the country. That material is then shipped across the Atlantic Ocean in British ships to the north of France where it is trucked a thousand kilometers to a nuclear facility in the south of the country. It’s a script that probably would not be greenlighted by any film studio because it’s too improbable. However, it is a scenario that has been approved by the United States, Britain and France, and it already happened.