ETA - link from altariel with more details. Her name was Patricia Maisch.
And it's like every time you confront these stereotypes - for example that heroes are armed muscular men, that women are naturally cowardly, that 'passivity' is a feminine quality - you have to start from scratch, as if all these real life events have never happened.
And think about that Bechdel Test - that it is a rare film which shows women talking to each other about stuff other than male romantic interests. This is women's whole life - well the great bulk of our lives - working, struggling, talking to each other about stuff. You know that James Tiptree Jnr story 'The Women Men Don't See'? I sometimes feel this is our whole existence, something happening in plain sight, but not seen.
I know there are many more important issues around this particular shooting, but I think they have been very well expressed by others, and I haven't seen this one mentioned much. I suppose just wanted to state a little tribute to the woman who helped stop the shooting, alongside all the quite justified anger and sorrow about all that happened before she intervened.