231. Who was the last Roman emperor in the Year of Four Emperors (69 AD)?
232. Which of the following Physicists aided Nazi Germany in their production of a nuclear weapon?
233. During which American Civil War campaign did Union troops dig a tunnel beneath Confederate troops to detonate explosives underneath them?
234. Who invented the "Flying Shuttle" in 1738; one of the key developments in the industrialization of weaving?
235. Which Las Vegas casino was originally constructed and operated by mobster Bugsy Siegel?