Milley is correct. It was an error in judgment. I can't trust a man who won't acknowledge responsibility for a fuckup. I CAN trust a man who recognizes an error and corrects it (to the extent it is possible to correct it – some things can't be undone.)
That said … according to the NPS - the folks on the ground, no teargas was used and I am damned sick and tired of that lie continuing to make the rounds. It is propaganda … and we need to stop calling it "fake news."