It is already changing. Give it a few weeks. Sweden and Hungary have already put border controls back in place, France will likely do as well as a result of this attack at least for the foreseeable future. After that - and coupled with the immense increase of cross-border crime in the last decade - it will be a fairly easy step to rescind Schengen, if not in name then at least in spirit or on a &#x27;temporary&#x27; basis. It&#x27;s the easiest way out of a lot of the current problems and it is a lot cheaper than militarizing the Balkans which has other side-effects that are mostly undesirable.