A quote from the article, Burns said; “For me, it was the sense that Vietnam was the most important event for Americans in the second half of the 20th century, yet we had done almost everything we could in the intervening years to avoid understanding it,” 
I would somewhat counter this statement by pointing out, from about 1981 to about the mid 90's, a number of movies and TV shows came out with either a character or an entire theme focused on the Vietnam War - Magnum PI, China Beach come to mind for TV. Hamburger Hill and Platoon come to mind for movies. 
With that, I know that the subject has been buried quite a bit in the intervening years with more narratives coming out of the gulf and Iraq wars. However, as Burns did point out, the issue is not resolved, which I admire his courage in trying to cover at this point in time - 40+ years since the fall of Saigon. Now whether he fully vaccinates America of the cognitive dissonance that the Vietnam War created, that remains to be seen.