In my 46 years of experience in journalism, I have often found that the most remarkable material surfaces by accident.
So it is with the Saigon Songs, recordings made in the Vietnam War, which have never been broadcast before.
They are among the most moving mementoes of war I have ever heard.
Their edge is sharpened, it seems to me, by a special relevance to the wars of today.
The Saigon Songs date from the Americans' hearts and minds campaign, between 1965 and 1967, as they poured their ground troops into Vietnam in support of the South Vietnamese government.
http://news.bbc.co.uk/1/hi/world/asia-pacific/7698055.stm