In September 1991, eight people were sealed inside which Arizona facility, hoping to live there for two years?

Which eight-letter antlered animals migrate in the Arctic? Which eight-letter word names your tibia? Eight members of which team were accused of throwing the 1919 World Series? 8 Mile Road, which gave its name to a 2002 Eminem film, marks the northern border of which city? Eight U.S. states begin with the letter M. Which other letter also begins exactly eight? In 1879 young María de Sautuola spotted prehistoric paintings of bison on the ceiling of which Spanish cave? Eight years after sailing around the globe (1577 to 1580), who helped England defeat the Spanish Armada? Many Americans who served in the Korean War are still listed as MIA. What does MIA stand for?