Beginning near Tampa Bay in 1539, which explorer led the first European expedition to see the Mississippi River?

Beginning in the 1950s, which American served as ambassador to the United Nations, to South Vietnam and to West Germany? Beginning in the 1970s, refugees who fled Vietnam and its neighbors in small, crowded vessels became known by what name? Beginning in the early 1970s, ads urged people to do what to their Bic lighters? Beginning in the mid-1930s, which wilderness photographer served as a director of the Sierra Club? Beginning service in 1832, which city's first streetcar was a horse-drawn car running along the Bowery? Beginning with 1970's "Get Yer Ya-Ya's Out!", which group had a top-10 album every year of the 1970s except 1979? Which singer-songwriter scored her first No. 1 pop hit in 1990 with "Vision of Love"? Begun around 1088, the university in which northern Italian city is considered the oldest in Europe?