Documentary About One Man Who Saw the 9/11 Attacks Coming...And Died On That Day

This was both informative and sad.

A man who pretty much saw 9/11, and particularly the World Trade Center attacks, coming. But some people did not like his style. And as it turns out, he wound up perishing on that day while helping people to try and escape the Twin Towers. He himself did not make it as a result.