For 10 points, name this Soviet representative on the UN Security Council who clashed with Adlai Stevenson during the Cuban Missile Crisis.
After the JFK assassination, this man issued a statement wondering it was a result of the "scum" of the American South. In one confrontation, this man's interrogator said "I am prepared to wait for my answer until Hell freezes over" after previously demanding he not wait for the translation to the question. For 10 points, name this Soviet representative on the UN Security Council who clashed with Adlai Stevenson during the Cuban Missile Crisis. 
After the JFK assassination, this man issued a statement wondering it was a result of the "scum" of the American South.
Valerian Zorin