What is the significance of a flag draped coffin?

Meaning  of Flag Draped Coffin  
All Americans should be given this lesson. Those who think that America is an arrogant nation should really reconsider that thought. Our founding fathers used GOD's word and teachings to establish our Great Nation and I think it's high time Americans get re-educated about this Nation's history. Pass it along and be proud of the country we live in and even more proud of those who serve to protect our "GOD GIVEN" rights and freedoms

I  hope you take the time to read this ... To understand  what the flag draped coffin really means ... Here is  how to understand the flag that laid upon it and is  surrendered to so many widows and  widowers.  
Do  you know that at military funerals,  the 21-gun  salute stands for the sum of the numbers  in the year 1776?