I'm not going to comment on that event - there are plenty of others better placed to do that - but I do want to highlight some of the other 'walls' that remain in Europe to this day.
In the far west we have Spain and Gibraltar. Spain ceded the rock to Britain after a military defeat, but has never reconciled itself to the loss of this territory. For Britain, Gibraltar is so strategically located that to hand it back would be a major loss. My guess is, however, that these two mature democracies could develop a solution if they put their heads together (e.g. give sovereignty back to Spain, which would then lease the territory back to the UK).
In the mediterranean we have the island of Cyprus, divided between the Greek South and the Turkish North. There has been a warming of relations between the two sides in recent years, both of which appear to have pragmatic governments that seek peace. Northern Cyprus is, however, Turkey's trump card in its relationship with the EU. It will only let the island reintegrate when Turkey itself receives a green light from the EU on membership.
Three of the 'walls' are in the Caucasus, and involve Russia as a sponsor of the conflict. In the southern Caucasus we have the conflict between European & Christian Armenia and Turkic & Muslim Azerbaijan over Nagorno-Karabakh. I'm not an expert on this one, however the solution would seem to me to be for Armenia to return the area to its rightful owner under international law (Azerbaijan), and for Azerbaijan to then give the region a large dollop of autonomy (so that its majority Armenian population could run their own internal affairs).
The walls separating South Ossetia and Abkhazia from Georgia are much better understood after last years Russo-Georgian war. These conflicts can begin to be resolved only when Russia exits militarily and is replaced by an unbiased international force. From that point on the solution would also involve autonomy within the internationally recognised borders of Georgia.
The last wall runs down the Nistru and separates Transnistria from the rest of Moldova. In some ways this would be the easiest conflict of all to solve. There is no substantive ethic basis for the dispute as there is in all the other conflicts mentioned above. The people of Transnistria have little to lose and much to gain from reintegration. There is little risk of inter-ethnic conflict.
The Transnistrian conflict has no substance. It's just about Russian misbehaviour (e.g. flaunting of the CFE treaty, non-adherence to its Istanbul commitments and continuing occupation of a foriegn country) and the narrow interests of a couple of business clans in Tiraspol. The solution to this one is actually dead easy:
- Russia leaves
- Smirnov hands over the keys to Ghimpu.