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>> you don't work for gm, but it seems unusual to you. you did a little research. you couldn't find that being done for other parts. even for gm, it made them difficult to calculate how many vehicles to recall. all this is true, yes? >> correct. i think that's what's continued to expand the number of cars being recalled for this issue. >> let's get to speculation here, but within your realm of expertise. why do you think you would change a part because you learned about that so you change it and not change the serial number? why would you do that? >> you know, at that point, i guess after list...

Having their b, c, d plans in place. i know it was stressful for many. the dev stays so severe ungeologist says it would be a miracle if the official toll is less than 10,000. but engineers are citing japan's strong building codes. infrastructure and city planning to keep houses away from the shore as reasons why the loss of human life isn't greater. all of this begging the question, how would the u.s. is fare in a similar disaster? with american infrastructure suffering from structural deficiencies in bridges, levees and leaking dams, are we prepared for a natural disaster of this magnitude? ...

>> you know, a subsurface well failure, the well was designed to take that load when it was originally drilled, and if it does fail, it could fail very deep. the fluids would never reach the surface in that case. >> so all in all, this is just pure positive news coming out of the gulf this morning. >> i really think so. the fact that they've got a mechanically engaged seal that's basically a flange instead of a slip-on friction seal, if you will, that's a great improvement. >> darryl, a lot of people have been asking the question. perhaps we just don't know how long things take from an enginee...

With a spill like this before, have they? >> no, we haven't had anything as significant as this. >> and this dome that we're talking about, this 74-ton dome that they would put down, they have never done that before, have they in. >> no, that's not entirely true. the dome concept has been used before, almost 30 years ago before my time. >> okay. but from an engineering standpoint, they really are winging it right now. this is new territory. >> the idea with the dome is it's a band-aid. it's trying to manage the oil that is coming out of the well at this point. it's the easiest thing that they ...

Spill of this magnitude. that's from an engineering standpoint. so at that point, we're talking about no seafood, no -- we got crab, we got shrimp. we are 70% of the nation's seafood crop comes from the gulf of mexico. >> mr. denmark, people who are looking around the country and they are watching this and they may not realize the shrimp they have in some instances, they have crawfish or catfish or oysters or whatever, which i eat weekly, that's all going to be affected. you are -- you probably won't be able to do any type of oyster netting or anything like that if that oil sinks to the bottom...