The war ended in Vietnam in '75 and bombings in Hanoi before that.
But the green pith helmet remains, worn by folk young enough to be the grandchildren of ex-servicemen. Before the compulsory wearing of motorbike helmets became law a few years ago, this headwear was worn by the great majority of Hanoi's xe oms (motorbike taxi drivers) and the odd man about town who wasn't quite ready for a new-fangled cap. In 2005, a mate's buck's night saw a dozen blokes riding from beer venue to beer venue in these retro noggin protectors. Not quite as ubiquitous as the non (conical hat), they will nonetheless be an enduring symbol of Hanoi for me.
And, by the end of the summer, I will have eaten the equivalent of this young man's entire tray of magnificent mangosteens.