Here's a Tweet From an NBC reporter repeating his colleague's reporting. I mean, we all knew this. There were no broken teleprompters, and we've seen the path of the bullets thanks to those amazing photos by that NY Times photographer, who actually captured one passing directly behind Trump. His head was turned, as opposed to the initial reporting that likely assumed it was glass because if he was facing forward and took an ear shot, he'd be dead.
Of course those posts were quickly deleted, but the rumor lived on until now. I'm sure the SS would have loved for it to have been glass though, as it would take little bit of the sting off of their failure. Maybe.