Just a few years ago Ed Munyak, a fire protection engineer for the city of San Jose, seemed like a lonely, out-there figure, a sometimes-target because of his outspoken position on the events of Sept. 11, 2001. These days, hundreds of other building trade professionals have joined him in challenging the official narrative about the collapse of three buildings at New York’s World Trade Center (WTC) on that fateful, traumatic day.