Updated timelines

The Development of American Football
The Development of American Football timeline
Historia del periodismo
Страны НАТО
Страны НАТО timeline
Tecnologia, Història i Ciència Ficció
December 1837, Rebellion in Upper Canada
Civil War
Ma Vie
Social Networking
Social Networking timeline
Emily Pauline Johnson
China Birth
China Birth timeline
Racial Violence in Public Schools
Racial Violence in Public Schools timeline
Native American Civil Rights
Social and Emotional Development of Infants
"Mason Alexander Randall" Social and Emotional Development
My Life
Samantha's Social and Emotional timeline
Samantha's Social and Emotional timeline