The idea that there were pre-planted explosives inside of the building is a thought that's been pondered by many families of victims, scientists, physicists, engineers, and many more. Franklin Square Fire Commissioner Christopher Gioia recently discussed his fire district's recent passage of a historic resolution supporting a new investigation into events of 9/11.
The latest news on 9/11 investigation progress comes from the University of Alaska Fairbanks, where professor and Chair of the Department of Civil and Environmental Engineering, Dr. Leroy Hulsey, will be releasing a new study proving "definitively," according to Architects and Engineers for 9/11 truth founder Richard Gage, that fire did not cause the destruction of World Trade Center Building 7 on 9/11.
This study has been in the works for a number of years, and the latest updates showed that, "the findings thus far are that fire did not bring down this building." (source) Building failure simulations show that, to match observation, the entire inner core of this building failed nearly simultaneously.