The Bright Flashes that occurred just before the Alleged Planes hit Towers 1 and Tower 2

Photos of the Jet Planes emmitting or receiving a signal flash just before crash-entering the North Tower and the south Tower.

If the planes were faked, then the flashes must have ignited the fuel bombs already set up inside the Towers.
Perhaps the flashes were ignitions to ensure that the Jet Fuel did ignite and explode?
Does anyone care of offer their own analysis of what the flashes were for...