America's National Zoo was just one year old when it became part of which institution in 1890?

America's first public high school opened in 1821 in which New England capital? Which sandwich cookie was introduced a few years before the Oreo, which came along in 1912? America's first successful world's fair, the Centennial Exposition, was held in 1876 in which city? Who hosted "America's Funniest Home Videos" from 1990 to 1997? Which race, held since 1897 when its course was 24.5 miles, is the world's oldest annual marathon? Which silent-film star was known as "America's Sweetheart"? Amid Republican gains in 1994, Democrat Zell Miller won his second term as governor of which state? Which Clinton aide and political advisor resigned in August 1996 amid allegations of personal indiscretions?