House Un-American Activities Comittee (HUAC) - investigated
"communist" activities and arrested several including the
"Hollywood 10" and were involved in the Alger Hiss Case
McCarran Security Act (1950) - communist organizations must
register with the government and publish all of their records
Alger Hiss Case - Alger Hiss accused and convicted for espionage
and perjury
Two More: Communist Control Act of 1954 and McCarran-Walter Act
of 1952