That second link (in original post above) was from CNN.. Yes, the Clinton News Network propaganda machine ...

Yes, It's propaganda, but it's true..

Lynda
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CNN Shows letter from Joint Chiefs..
https://www.cnn.com/2021/01/12/politics/joint-chiefs-memo-capitol-insurrection/index.html

This is from New York Slimes..

WASHINGTON — The military’s Joint Chiefs of Staff sent an unusual message to the entire American armed forces on Tuesday reminding them that their job was to support and defend the Constitution, and declaring that Joseph R. Biden Jr. would soon be their next commander in chief.
https://www.nytimes.com/2021/01/12/us/politics/joint-chiefs-capitol-constitution.html

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CNN
In a grim sign of the military's alarm, CNN has learned the US Army is taking additional steps to screen the National Guard contingent providing security at Biden's inauguration for extremism.
https://www.cnn.com/2021/01/12/politics/joint-chiefs-condemn-sedition/index.html
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Reuters

https://www.reuters.com/article/us-usa-election-capitol-military/in-rare-joint-message-top-us-military-leaders-condemn-capitol-riot-idUSKBN29H2WF
The military leaders said that President-elect Joe Biden would be inaugurated on Jan. 20 and become their commander in chief.

so many more..