Cannon blasts, 21-gun salute honor war dead on Memorial Day – Orange County Register
Why the number “21” in a 21 Gun Salute? - Quora
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Does the President and Vice President receive a 21 gun salute as a matter of courtesy? - Quora
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Why Do They Use 21 Guns in the 21 Gun Salute?
21-gun salute - Wikipedia
July 4th 'Salute to America' Honors U.S. Military Personnel > U.S. Department of Defense > Defense Department News
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Why are rifles fired at a funeral for people in the service? - Quora
Since 21-gun salutes are reserved for Generals and other high-ranking officials, why did Chris Kyle (American Sniper) get a 21-gun salute? - Quora
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