Excellent presentation. Very useful. Having a multi-zone deployment definitely reduces the risk of not being able to service the end users. But the cost does go up. Are there literature on how many zones have had outages in the past, which ones, for how long and for what reason? This information will help us decide if we really have to go with multi-zone or just a single-zone and save on some cost. This can be a significant difference in the project cost. Could you please point us to a 'white paper' on this if one is available? Many, many thanks for this wonderful video.