A New Deal agency created in 1933 sought to bring electricity to residents of which river's valley?

A near-riot broke out when Boito's opera "Mefistofele" premiered at which Milan opera house in 1868? A nene is which type of goose? Which Italian neorealist classic was originally titled "Ladri di biciclette"? A New Bern, North Carolina, pharmacist invented which drink in 1898, claiming it aided digestion? Which company makes the F-150 pickup truck? A new Ford V-8 stolen in Topeka on April 29, 1934, became world famous weeks later when which pair died in it? A cave near New Haven, Connecticut, hid two judges who had signed which king's death warrant in 1649? A new illustrated edition of which scientist's "A Brief History of Time" was published in 1996?