Amid posturing between the United States and the Soviet Union construction begins on the Berlin Wall, dividing the city physically between the Cold War ideologies.
The blockade of Cuba by the United States works and the Soviet Union backs down. This averts the outbreak of a potentially catastrophic war between the superpowers.
President John Kennedy deals with communist expansion in Vietnam and promises aid to the South Vietnamese but doesn't plan on large scale involvement of US forces.
This scene showcases the concept of "mutually assured destruction" when Brigade General Jack Ripper recommends attacking with nuclear weapons before the enemy does.