Mark, of WeAreChange Boston, recently met with world renowned theoretical physicist and author, Dr. Michio Kaku. Mark took the opportunity to question Dr. Kaku about the overwhelming evidence that World Trade Center towers 1 and 2, along with WTC building 7, were brought down by controlled demolition on September 11th, 2001. He also questioned Dr. Kaku concerning the presence of molten steel and other metals at ground zero. Here is a clip of the exchange.