I just wanted to give a little update on the border situation.
As the ADM pointed out, the borders of Sudan are very porous, and this is a major issue going forward. However, there are some positive developments in the case of Chad, which I think has one of the longest borders with Sudan. About six months ago, there was a rapprochement between the governments of Chad and Sudan for the first time in probably many decades. This peace agreement I think has helped stabilize the flow of refugees across that border.
I just came back from Eritrea about 10 days ago. This is quite interesting: there are now refugees flowing from Eritrea into Sudan at the pace of a few hundred a day. So conditions must be pretty bad if people are moving to Sudan as a place of refuge. This will be something interesting to watch over the next few months.
There are very interesting developments in the Central African Republic. The LRA, the Lord's Resistance Army, which actually was started in Uganda, has spilled over to Sudan and to the Central African Republic. That's an example of how these guerrilla movements spill over from one country to another.
But the short answer is that, yes, porous borders remain a problem and a concern.