I read an article found at the following link that included this information about Keith's song:
"Keith wrote "Courtesy" a week after the Sept. 11 attacks. In part, it was a way of dealing with his grief over the March 2001 auto-accident death of his father, H.K. Covel, 64, an Army veteran who was killed after another car pushed his in front of a bus. The song was so blazingly vengeful that Keith had no intention of recording it. He did so only after his associates and high-ranking members of the military insisted. As a result, even Defense Secretary Donald Rumsfeld has sent him a handwritten letter of appreciation.
What's moved him even more, Keith says, is what the song has meant to soldiers. Patrick Miller, a POW from Valley Center, Kan., defiantly sang "Courtesy" to his Iraqi captors. Later, Keith secretly showed up at a homecoming for Miller in Kansas. As the soldier reprised the song's opening bars, his pastor asked Miller if he needed help -- a sign for Keith to stride onstage. They sang it together, and Keith gave Miller one of his flag-motif guitars. "To see big streams going down his face," Keith says, "I just had to hand him that guitar." "
Now THAT is beautiful!
Tremendous. Dangit, my screen got blurry...