History You Should Know: World War 2 (Part 1--1939 to 1941)

We Americans are notorious for NOT knowing a lot about history, even the history of the not too distant past that affects us today!  We know something about World War 2 battles because of movies ("Saving Private Ryan") or because our great-grandparents were involved.  But do you know WHY it happened?  What were the events that led up to a war that killed 60 million people in six years?  Tune in and find out!