Hanging out with locals has always been the best thing about travelling in Vietnam. The streets of Hanoi have been especially rich terrain for encounters with wonderful old folk. On a recent visit to the capital, I met Mr Binh, the man who played former US Defense Secretary Robert McNamara's would-be assassin in wartime theatres across the north. People like Mr Binh embody so much of what first captivated me about Vietnam more than two decades ago. For more on Mr Binh, check out https://www.rust