Did you know there was actually an attempt by an Algerian Islamic group to crash a highjacked plane in the Eiffel Tower? This was in 1994. In OTL, the plane was rerouted to Marseilles (the pilot told the highjackers he was low on fuel), where the highjackers held the passengers hostage and demanded a refueling and the right to take off again (to crash on the tower, as was found out later). Instead, the GIGN stormed the plane. End of OTL story. I think your PoD is right there. What if, instead of being rerouted, the plane is allowed to continue to Paris?