I hope this is the right place to put this. I have read a few books and articles which dispute the official account of the 9/11 attacks. One of the things they question are the mobile phone calls. On the day several mobile phone calls were apparently made from flight 93 and I think another plane. However some of the things I have read suggest that it was not possible for mobile phone calls from the planes to connect to people on the ground. The planes were at normal cruising altitude. What is the truth of this? Could ordinairy mobile phones have been used to call people on the ground from the planes? Can someone comment. Thanks.