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Across 5. to express a formal disapproval of an action 6. a shelter built with the intent to house and protect people from nuclear fallout 7. lying when one has sworn under oath to tell the truth 8. the political and military barrier that isolated Soviet-controlled countries of Eastern Europe after World War II 9. the willingness to go to the brink of war to force an opponent to back down

Down 1. a systematic attempt to overthrow a government by using persons working secretly within 2. the policy or process of preventing the expansion of a hostile power 3. the Communist countries of Eastern Europe 4. a war fought to achieve a limited objective, such as containing communism 6. radioactive particles dispersed by a nuclear explosion