Who am I? Cold War edition

I popularised the phrase "Iron Curtain"

I was Director of the FBI for 37 years

I am the eighth and last leader of the Soviet Union

I believed that "Stalin was a very distrustful man, sickly suspicious."

I say that "Those who dare to fail miserably can achieve greatly"

I believe that "Marxism taught me what society was"

I was part of the Big Three at Potsdam, replacing Churchill

I have in my hand the names of 57 "card-carrying communists"

I was one of the writers of the Communist Manifesto

I made decision to drop the atomic bomb on Japan

I oversaw the Allied invasion of continental Europe on ‘D Day’ (June 1944)