Notice one of the hijackers resemblence to John Doe 2.... Syed Gul Mohamed Shah (also known as Ayub Ali Khan), who happens to have Pakistan connections, just like the ISI paymaster to Mohammed Atta.
Another connection haunts me. Remember Debra Von Trapp (who fingered Robert Goetzman in the Foster killing). She said that the OKC bombing was payback for the Aum Shinri cult Sarin gas poisoning in Japan, which happened just prior to OKC. The Aum cult had scalar weapons...and the OKC bomb was scalar, not nitrogen.