My step-daughter recently mentioned Vietnam—as her step-mother’s latest vacation hot spot. “Wasn’t there a war there?” she asked. Let’s give Sasha credit; at least she knows there was a Vietnam War. At least two generations of Americans have never heard of the place. How times have changed. If someone had rolled up to a college campus on this trike in, say, 1968, there would have been instant strife. Nowadays, college kids are mostly mute on America’s military adventures (especially the ones supported or initiated by Barack Obama). They’d probably ask “What movie is that from?” Even so, this image remains incendiary, if only because there are still a few elderly hippies who’d find the rolling homage offensive or, worse, would shake their head in condescending sympathy. What gun is that anyway?