Answer 1: The "Bay of Pigs" invasion was the failed landing of Cuba by exiled Cuban citizens who strongly opposed Fidel Castro on April 17 1961.
Answer 2: President Dwight D Eisenhower took responsibility for the invasion.
Answer 3: The Cuban missile crisis was the event of, what was then the Soviet Union, putting ballistic missiles in Cuba.
Answer 4: The main result of the Cuban missile crisis was a buildup of nuclear weapons on both sides of the cold war in preparation for the war to take a turn. This caused the M.A.D effect, Mutually Assured Destruction effect. Which means that if either side made a move the destructive power of the weapons of use would be strong enough to destroy the world multiple times.
Answer 5: President John F Kennedy's response to the Berlin wall would include, freedom speeches for those in East Berlin, negotiations about more open boarders (which ultimately failed), and even dropping food supplies on the starving population of East Berlin from low flying bomber that were repurposed for that role.
