North America


 * 1) The "bomber gap"
 * 2) The "missile gap"
 * 3) Black Liberation Army (BLA)
 * 4) Weather Underground Organization (WUO)
 * 5) Symbionese Liberation Army (SLA)
 * 6) McCarthyism
 * 7) 1 First Red Scare (1918–1920)
 * 8) 2 Second Red Scare (1947–1950s)