Event:
Pope Pius XI encyclical On persecution of Church in Mexico
More Notable Events on November 18:
1993 NAFTA passes House of Representatives
1970 Linus Pauling declares large doses of Vitamin C could ward off colds
1970 Russia lands self propelled rover on Moon
1961 John F. Kennedy sends 18,000 military advisors to South Vietnam
1936 Main span of Golden Gate Bridge joined
