In 1920, the League of Nations held its first assembly in Geneva.
In 1939, President Franklin Roosevelt laid the cornerstone for the Jefferson Memorial during a ceremony in Washington, D.C.
In 1969, Vietnam anti-war demonstrations reached a peak when an estimated quarter- to halfmillion protesters marched peacefully in Washington, D.C.
In 2006, the international 24-hour news channel Al Jazeera Englis…