What are your go to events for shocking people into learning about US imperialism in South America?
The overthrow/killing of Salvador Allende is the strongest in my opinion. What else would you pick?
I would say Halls Of Montezuma, but it's so far back that it's easily handwaved.
It's not the worst because it's a competitive field, but giving millions of dollars to death squads in El Salvador was what I thought of.