Two of John Brown's sons were killed during his October 1859 attack on the federal arsenal at which site?

Karl Ferdinand Braun shared the 1909 Nobel Prize in Physics for work on wireless telegraphy with which Italian? Which two astronauts walked on the moon on July 20, 1969? In 1924, two new place names honoring the same man appeared on the Soviet map: Ulyanovsk and which other? Which of these is one of the three classical orders of ancient Greek architecture? Which artist's major works include "Synagogue at Safed" (1931) and "King David" (1951)? Along with the clavicle, which bone meets the humerus at the shoulder? Along with the Irish and the English setter, which breed, named after a Scottish duke, completes the best-known trio of… Along with Bach and Beethoven, which composer completes the "Three B's" of classical music?