Second half of the 20th Century: The Cold War. One of the most perilous times in the United States. Americans were up against Cuba, the Soviet Union, and their communist ideas. We were on the brink of a nuclear war. Missiles were first located in Turkey. There was later the Cuban Missile Crisis in the 1960s, after Castro formed an alliance with the Soviet Union and photos of missiles were captured in Cuba (1962). Kennedy declared a blockade against Cuba.