When Israel withdrew from Lebanon in 2000 the UN separated the two countries by a thin blue line. But border disputes and enmity keep tensions high. This video highlights how a an artificial concept such as a border can lead to serious real life difficulties.
This is a really good teaching tie in between Geography and TOK, in that this concept of the creation of borders has led to a lot of conflicts e.g. Iraq, Pakistan/India.
Adorngeo's Blog 