NYFD Firefighters say they heard explosions and believe the towers were brought down by high-explosives. Radio recordings show the NYFD Firefighters say they heard explosions and believe the towers were brought down by high-explosives. Radio recordings show the firefighters in the towers saying there were only two small pockets of fire and should be able to knock it out with two lines. But then the buildings came down…it wasn’t the small fires in the towers, it was high-explosives! FireEngineering Magazine says there is no way that jet fuel brought down the towers, and to stop hauling away the debris at the crime scene! **Cover up!** But how did bombs get planted in the buildings?