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>> government scientists here in seattle say their tsunami warning systems saved a lot of lives but they're not sure what would happen if the big one hits the pacific northwest. >> brown: and margaret warner updates the political chaos and escalating violence in the african nation of ivory coast. that's all ahead on tonight's "newshour." major funding for the pbs newshour has been provided by: >> you can't manufacture pride, but pride builds great cars. and you'll find it in the people at toyota, all across america. >> auto companies make huge profits. >> last year, chevron made a lo...

>> government scientists here in seattle say their tsunami warning systems saved a lot of lives but they're not sure what would happen if the big one hits the pacific northwest. >> brown: and margaret warner updates the political chaos and escalating violence in the african nation of ivory coast. that all ahead on tonight's "newshour." major funding for the pbs newshour has been provided by: >> you can't manufacture pride, but pride builds great cars. and you'll find it in the people at toyota, all across america. >> auto companies make huge profits. >> last year, chevron made a lot ...

>> woodruff: spencer michels looks at the science behind tsunamis and whether japan's crisis is a wake-up call for the united states. well, the rebels are responding to the government's artillery >> government scientists here in with their rockets, and on the assumption that those rocket seattle say their tsunami batteries will then be targeted warning systems saved a lot of lives but they're not sure what by the pro-qaddafi artillery, would happen if the big one hits we're moving back every time the pacific northwest. they're fired. >> brown: and margaret warner updates the politica...