What happened and why?
Will it happen again?
A discussion for Social Studies and Civics classes, no other.
This topic is perfect fit for Cooperative Learning, a teaching style which develops five student groups to analyze, discuss and present one or more points of view.
Engaging students with each other, allowing them to interact with different points of view, encouraging supporting theories with facts are curriculum development points.
This is not a topic, actually no topic is worthy of a lecture approach.