 And the gunman quickly began firing at Trump. Now, it's not clear why the officer didn't alert Secret Service or why he didn't engage the shooter immediately, which is what he should have done, or why he wasn't on the rooftop to begin with. Late last night, NBC News reported that, quote, the roof where the suspect was located was a well-known high-priority vulnerability. It was identified just the day before during a security walkthrough. Well, that obviously makes sense. You'd have to be blind to miss the rooftop. I could