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Earthquakes are there per year above 8.0? >> one per year. this should be our only one. we talked about the 6. 2 after shocks. there's a significant chance of at least a 7 or greater after shock. so if there's a 9 earthquake, there could be an 8 after shock. if there's a 6, there could be a 5. we go one full order down the line. so i think there's going to be much more shaking tonight. some of these buildings were already cracked. that's why they don't want to be in the way of these cracked buildings if another 7.0 continues to shake that structure. >> we're joined by david gallo and cnn's saf...

And it's a critical part of the world. that's why we're rebalancing here. to be part of this is something we're proud of and hopefully we can help. >> commander marks, we appreciate you talking to us and all your efforts. thank you very much. i want to bring in our panel here who have been with us throughout the evening. cnn safety analysis david soucie. richard quest, david gallo, co-leader of the search for air france 447. and also former transportation department inspector general mary schiavo. david, let me start off with you. i still find this confusing. so all the satellite data, which...