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McCarthyism, the practice of making accusations of disloyalty, subversion, or treason without proper regard for evidence, was the focus of Edward R. Murrow's hard-hitting reports on his television program "See It Now." Murrow's exposé of Senator Joseph McCarthy's tactics and unsubstantiated claims played a crucial role in diminishing McCarthy's influence and eventually led to his censure by the U.S. Senate in 1954.