Econimic and Political Changes By cheech08 Mar 12, 1947 President Harry Truman announced Truman Doctrine, giving aid to Turkey and Greece May 11, 1949 Soviet blockade ends Soviet Blockade in Belrin ends Jun 8, 1949 The red Scare reaches peak with numerous American celebrities as members of communist party Nov 1, 1952 The USA tested the first nuclear bomb Jun 2, 1954 Joseph McCarthy charges that communist have infiltrated the CIA Sep 8, 1954 Foundation of the SEATO is formed to resist communists Oct 4, 1957 Sputnik satellite launched