Updated timelines

WWII timeline
my summer
my summer timeline
my fun and scary moments
Secondary succession
Secondary succession timeline
Beethoven
Beethoven timeline
Michael Jackson
Michael Jackson timeline
My Top Ten Unforgettable Moments
My Top Ten Unforgettable Moments timeline
Línea histórica
World War II
World War II timeline
Maquinas Voladoras
Maquinas Voladoras timeline
Men's Track in the Olympics
Health Services Career Timeline
The History of the Atomic Theory
El Tiempo y su historia
El Tiempo y su historia timeline
Events of 1960-1970
Portugal's Exploration and Colonization
Portugal's Exploration and Colonization timeline