Updated timelines

World War I
Aperture Science
Joseph Stalin
History of the Computer
Peru
Sociedad contemporanea del siglo XX
Cold War Activity
The Birth of Modern America
Scientists Contributed to Atom
APUSH Annotated Timeline
The Civil War
TU AMOR ES UN SUEÑO
Desarrollo historico de la constitucion politica de los estados unidos mexicanos
Robbert Oppenheimer's Life
computing past 2 future
Blood Education Video