Two famous spy cases caused the nation to become suspicious due to the rumors that the United States were aiding communists. In 1948 Alger Hiss was accused of being communist by Whitaker Chambers. However, Hiss denied the charge and Chambers was sued. So then Chambers said that his was a Soviet spy. After two trials Hiss was convicted for lying in the case and he went to prison for 4 years. This proved that there was a real communist threat in the Unites States and Hiss' case continues to be debated. The second spy case was several months after Hiss' case. Julius and Ethel Rosenberg were accused of passing atomic secrets to the Soviets during WWII. After a very debatable trial the Rosenberg's were convicted of espionage and were killed in 1953. Both of these cases were debated for many years and caused contention within the nation.