1. What was the primary objective of the Manhattan Project? - A) To build the first atomic bomb - B) To develop a defense against atomic attacks - C) To create a new energy source for civilian use - D) To establish international peacekeeping protocols Answer: A) To build the first atomic bomb Rationale: The Manhattan Project was a secret research project during World War II that aimed to develop the first nuclear weapons. 2. Which president authorized the use of atomic bombs against Japan in 1945? - A) Franklin D. Roosevelt - B) Harry S. Truman - C) Dwight D. Eisenhower - D) John F. Kennedy Answer: B) Harry S. Truman Rationale: After the death of President Roosevelt, his successor, Harry S. Truman, made the decision to use atomic bombs in the hope of ending World War II swiftly. 3. The term "Iron Curtain" refers to: - A) The division of Germany after World War II - B) The boundary separating NATO and Warsaw Pact countries during the Cold War