In the 1580s, which Russian tsar killed his own son and heir in a fit of rage?

Bacteria help turn milk into which food? Which singer-songwriter had hits with "Bad Blood" and "Laughter in the Rain"? In the Bosnian Crisis of 1908, which dual monarchy annexed Bosnia, stirring resentments that helped lead to World War I? Patty McCormack played an evil little girl in which 1956 film, based on a Maxwell Anderson play? Which director made the films "Badlands," "Days of Heaven" and "The Thin Red Line"? Which U.S. city has been nicknamed "Baghdad by the Bay" and "The Golden Gate City"? Baghdad, Iraq, lies on which river of the Fertile Crescent? Baghdad is on the Tigris; which river is the Iraqi city of Fallujah on?