In 1997, a wagon train reenacted which religious group's 1847 pioneer trek to Utah's Salt Lake Valley?

Which battling puppet couple, with roots in 17th-century Italian theater, became a classic British seaside show? At least 10 architects worked on which church after Pope Julius II decided to rebuild it in 1506? At least 20 died and many suffered decompression sickness building which East River landmark, opened in 1883? At least 57 people died as a result of which U.S. volcano's May 18, 1980 eruption? After going into exile in Mexico in 1955, which Cuban revolutionary led forces that landed in Cuba in December 1956? At Market Square Arena on June 26, 1977, which king of rock 'n' roll gave his last live concert? At Moscow's American National Exhibition in 1959, which two leaders held the impromptu "Kitchen Debate"? At nearly 11,000 feet, which active volcano is Sicily's highest point?