When you're building a house of cards you have to be careful pulling out the ones that a bit ragged and damaged, because the whole thing might fall down. There's a point at which you can add on enough extra cards to make it pretty stable, but it takes time and demands caution.

The numbers of people killed or injured is way down, and that's a solid fact. And for a hint of what a breakdown in the peace process could mean, have a look at what's happening in Israel and Palestine.