The scenes that led up to something

If you were granted a wish to hear and see what led up to any event in the world that you thought was significant in 3D view with clear sound from each angle of each person(s) directly and indirectly involved, what two events would be a must listen and watch for you?

Yes, pretend it's as if each person(s) involved in any significant event weren't aware they were each as a A/V recording device.

And plus, you could review to hear their exact thoughts during the lead up to event, too, because of a special, optional feature included in your granted wish.

By the way, the events cant be any that you were involved in in any way. They must be famous events that are in the solved or unsolved category.