Knowing how the Army works, I have a lot of trouble believing this.
I don't have trouble believing this with Marxists in WH, DOD & State.
In order for this "relieved-on-the-spot" scenario to play out, the WH, DOD, & State would have had to had the full and immediate cooperation of Ham's deputy commander and subordinates as well as the Joint Chiefs of Staff, all the while a major terrorist attack was under way.
Just don't see it happening.
Afterward, when the search for a scapegoat was underway, sure, but not during the attacks themselves.