Part One of Two. This time we're drinking Yellow Belly Imperial Stout while taking an intensive look at the founding of the United States' longest-running terrorist organization, the Ku Klux Klan. Along the way, we'll try to sift fact from fiction about the group's earliest days, examine factors leading to the Klan's formation, and dig down to the bedrock cause of the American Civil War. (Spoiler alert — It's not what you think.)