Conversation so far:
How is Richard Nixon associated with the Soviet Union?
Richard Nixon initiated détente and the Anti-Ballistic Missile Treaty with the Soviet Union the same year.
Did Richard Nixon travel to the Soviet Union?
Following the announcement of his visit to China, the Richard Nixon administration concluded negotiations for him to visit the Soviet Union. The President and First Lady arrived in Moscow.

Question: Who didthey deal with while they were there?
Self-contained rewrite: Who did Richard Nixon and the First Lady deal with while they were in Moscow?