Many experts believe that the other version does not exist, an explosive device was most likely in the luggage compartment, Egypt is not particularly controls of passengers, luggage Kogalymavia not check as thoroughly as they do in, say, Israel or the United States. America has put forward the version that the bomber blew A321, but the martyr, perhaps, was inside the ship, but the explosive device apparently could not be on it.
The Islamic State immediately claimed responsibility for the attack, but they are usually just confirm the attacks, all the events that are taking place in Syria, Russia is closely tied between the facts of the crash, and it does not look like an accident. Putin had made a very bad enemy in the world, and thus decided to take revenge LIH Russia.
Recall that the plane was torn into two pieces exactly in the air at an altitude of 10 km. The wreckage of the liner fell in a radius of 30 km, it is entirely indicative of an explosion rather than a technical failure in the event of malfunction pilots report to urgently return to the dispatcher and to plan for landing the plane.
Once confirmed the fact of attacks, Putin will have to justify not only the relatives zagiblih children, and take the blame in full volume, since it all began with the war in Syria.