After the Soviet Union launched the world's first artificial satellite in 1957, Eisenhower authorized the establishment of NASA, which led to the space race. During the Suez Crisis of 1956, Eisenhower condemned the Israeli, British and French invasion of Egypt, and forced them to withdraw. He also condemned the Soviet invasion during the Hungarian Revolution of 1956 but took no action. In 1958, Eisenhower sent 15,000 U.S. troops to Lebanon to prevent the pro-Western government from falling to a Nasser-inspired revolution. Near the end of his term, his efforts to set up a summit meeting with the Soviets collapsed because of the U-2 incident. In his January 17, 1961 farewell address to the nation, Eisenhower expressed his concerns about the dangers of massive military spending, particularly deficit spending and government contracts to private military manufacturers, and coined the term "military–industrial complex".

In what year did the Soviets launch humanity's first artificial satellite?