The Challenger disaster tape is often too tough to handle for me. I was at the convention that it was made at. The con happened just a few months after the disaster, and the musicians had time to put their emotions to words. It is hard to come by, the publisher went out of business, i think. The biggest problem for the singers was to get some emotion in their voices with out being overcome with it. Some did manage that balance perfectly.
I will try to get some of the songs mentioned.
Eric Bogel and Stan Rogers I know and they do fit this catagory.
There is a song called Cranes over Hiroshima that I have trouble singing.
As a parent, there are more songs that shut down my voice then there was 8 years ago.