What Caused Building Collapse In Tehran?

Statement on the collapse from Architects & Engineers for 9/11 Truth:TEHRAN BUILDING COLLAPSE: Investigators Must Consider ExplosivesAt approximately 11:30 AM local time yesterday in Tehran, an iconic 17-story high-rise known as the Plasco Building tragically collapsed after being on fire for some 3 ½ hours. It is not yet known how many firefighters and civilians…

via The Plasco Building Collapse: Explosions & Flashes — SPOOKYWEATHER