UnScramble this Word: r i a a i x v t?

Questions

Richard Nixon first American president to visit China.?

Charles Rocket clearly says a four-letter word on Saturday Night Live.?

Popcorn is introduced by an Indian named Quadequina to the English colonists at their first Thanksgiving dinner.?

George Washington, father figure for U.S., President (1789-1796), born.?

Johann Nikolaus Forkel, musicologist and first biographer of Bach, born.?