The State Hermitage Museum, one of the world's largest art museums, is in which city?

A deadlocked jury is called what 4-letter word? A deadly disease was identified after an outbreak at which group's 1976 convention in Philadelphia? A deaf and blind girl gets help from a special teacher in which 1959 play? How many sides does a decagon have? Pressure from which ruler led to the dissolution of the thousand-year-old Holy Roman Empire in 1806? Which word means both a deep guttural sound and slang for a U.S. infantryman? Which word means both a deep shade of black and a plane like the 747? A deep-space probe launched in 1987 left which hero frozen in suspended animation until the 25th century?