What's Going On?

I intend to keep mentioning the Vietnam War here. John's legend, as huge as it was before he protested this war, doubled in size when he went on his heroic crusade against the war. How do like that choice of words. To define John fully, we must define 'nam.

This is a moving clip juxtaposing images from the Vietnam War with Marvin Gaye's "What's Going On?"