Copy that Christine.
The problem with “what if” situations like that is analyzing and evaluating What if?. My tendency would have been to fuck the analysis and charge in. But what if he had an IED of some sort with him and blew up the whole freakin place and everyone in it when I attacked? What if he was hiding behind a wall of hostages. What if….? Thinking all that shit through, especially in what was likely an ill-defined and evolving command and control structure, takes time. In this case too much time.
Training for such things is rooted in the concept of deescalation first, then analyze, then act. This tragedy did not fit that protocol. Someone with greater skill and bigger guns needed act, to go in and end it. Which is apparently how it ended. But it seems obvious, in hind sight, that way too much time passed before that action was taken.