1. With an estimated 15.5 million weekly listeners, whose radio show is the most popular one in the United States? First and last name required.
2. Name either Antonín Dvořák's most famous opera (titled after a Slavic water sprite) or Mikhail Glinka's most famous opera (based on a poem by Pushkin).
RUS - Rush Limbaugh; Rusalka (Dvořák), Ruslan and Lyudmila (Glinka)