Arlington House was the family mansion of which Confederate general until the U.S. government confiscated it in 1864?

Arkansas's Boston Mountains are the highest part of which highland region? Which former head of the Arkansas Department of Health became U.S. Surgeon General in 1993? Which Arkansas senator, who served from 1945 to 1974, sponsored a famous program of international educational exchanges? Which five-sided building in Arlington County, Virginia, is one of the world's largest office buildings? Arlington National Cemetery holds the mast of which U.S. battleship that exploded in Havana harbor in 1898? Armagnac, from Gascony in southwestern France, is what type of spirit? Armand Jean du Plessis, who became chief minister to Louis XIII in 1624, is better known by what title? In 1991, Armenia declared its independence from which collapsing state?