 Analyst Peter Bergen argues this point in his book "The Battle for Tora Bora" Judging by the possibilities and the amount of US Military assets focused on such a small region, the theory that the Haqqani network aided in the escape seems reasonable.Regardless of exactly what occurred in those mountains, the Haqqanis played a role.And their actions of providing safe-havens for Al-Qaeda and Osama Bin Laden show the strength of bond and some role in or knowledge of Al-Qaeda and Bin Laden's escape.