What we tend to do is to brief ourselves very thoroughly on vulnerable spots in the world, and in countries where we already have links and where we've worked before and we know the background because we, we feel we need that and we monitor very carefully certain events which could lead to a disaster, so that when the disaster does happen, like for instance the Ugandan famine of nineteen seventy-nine to eighty-one, we knew exactly when it was going to happen and we knew exactly where the people were, we knew who was going to be affected, we knew why they were affected, we knew where the food stocks were, we knew how long it was going to take to get so many thousand tonnes of food from A to B erm and how many trucks you would need.