Terrorists on the plane

Two suspected terrorists on the french govts watch list were passengers on the Air France plane that crashed in the Atlantic ocean. Counter terror experts say the names came off the passenger list after the crash, as they combed for clues. There had been numerous bomb threats against the airline prior to this flight. So, the question begs to be asked. How did two known terror suspects get on a plane belonging to a company that had received threats? Why bother compiling these lists if you're not going to use them? Were the airlines aware of these people? Or was it one of those closely held govt secrets? The names of the two have not yet been released, and it could have been strictly coincidential, but I don't think so. the easy answer is to blame the crash on the weather, lightning, or an internal computer malfunction. but that's the easy answer. The tough one will be to find out where, if not to a one way death trip, these two were going. Why there is so little evidence at the scene, and if there are new tactics in play. It will be important to learn who the two were affiliated with, their backgrounds and politics. I am always sceptical when i see planes that are falling out of the sky, not during takeoffs or landings, And this is one to be sceptical about. Obviousluy someone did not take the threats seriously enough, and to allow two suspected evil doers to board under those circumstances is criminal.