Why 21-Guns in a Salute? Why Not 20?

Factual Questions
1

What is the origin and significance of a 21-gun salute? Here, in DC, there will be a 21-gun salute on Friday in memory of RWR. Why 21? Maybe it stems from the guy who invented Black Jack? :wink:

  • Jinx
2

http://www.straightdope.com/mailbag/m21gun.html

3

My wife just asked me this question. I knew the dope would come through. Thanks