Conducted by the U.S. government every 10 years since 1790, what is a major resource for people tracing their ancestors?

In 1773, John Adams wrote in his diary, "This is the most magnificent Movement of all," about which event? Which author concluded his four-book Berrybender Narratives with the 2004 novel "Folly and Glory," featuring Kit Carson… London's thick "pea soup" or "pea-souper" was a famous kind of what weather condition? Which degree did Condoleezza Rice earn from the University of Denver in 1974? Old English "coney garths" and "pillow mounds" were built to house which animals? In October 1967, Fidel Castro confirmed that it was "sadly true" that which revolutionary had been killed in Bolivia? Which capital of the Democratic Republic of the Congo was founded by explorer Henry Morton Stanley? Which document did Congress adopt in 1777, though it was not ratified by all the states until 1781?