They'll tell you that they are there as part of a balance - a balance of fear. If these pilots of a front-line Phantom Squadron in Germany can convince the other side that they and their aircraft are primed and ready to fight, then, so the theory goes, they may never have to. When exercise sirens sound across RAF Wildenrath, Man Alive takes off with the aircrew for a nightmare preview of the phantom that haunts us all - the Third World War.