The same year that 9/11 took place, I drove from Pittsburgh to Scranton, Pa. When I left Pittsburgh, Pa., there was not any cell phone reception almost all the way from one city to the other. Another thing about the 9/11 that I remember was the Pittsburgh paper had an article that said the plane went down near an underground bunker called, "Site R". Bush grounded all planes across the US, but one at Greenville/Spartanburg airport was given clearance. The Air Force One took President Bush in the sky and Pres. Bush kept saying, "Cheney is ok, Cheney is Ok. He is safe in an underground bunker".
Some time after the 9/11 event, I met a woman who said that she helped at ground zero. She said that she and others supplied boots for the first responders and firefighters. I asked why. She told me that the ground and rubble was so hot that it was melting the soles off the shoes. She said that any paper dropped onto the concrete would blaze in fire as soon as it touch the surface.