It's 70 years since the conference that set the tone for the division of Europe and the Cold War. Soviet leader Josef Stalin hosted U.S. President Franklin D. Roosevelt and British Prime Minister Winston Churchill at the Crimean Black Sea resort of Yalta to discuss arrangements in Europe after the defeat of Nazi Germany. It was agreed Germany would be divided into four separate zones of occupation. In addition, Stalin demanded the establishment of a Soviet sphere of influence in Eastern Europe -- eventually establishing a chain of communist satellite states.