Pda phone review

Was listening to an oldies station on the radio last night and heard a song that I would like to hear again. I caught part of it on my PDA, but the DJ never said the name or artist. The singer had a kind of a gravelly voice. Part of what I got goes like this:

There was a sad sad lady
Weeping all night long
She received a sad sad message
From the voice on the telephone
How could she tell her children
Their father was shot down

Any help would be appreciated. It sounded like an old Viet Nam protest song, so I will assume it is from the 60s or 70s
Thank you…….