Detailed text transcripts for TV channel - CNN - 20100507:10:04:00
>> it could be a turning point in the gulf. crews begin lowering a containment dome over a leaking well. when the next 72 hours, we should know if the underwater experiment should work. they are hoping the dome will be able to capture and funnel the leaking oil to a waiting tanker above. david mattingly is live in venice. we know this dome operation is something they've never tried before. give us an update on how it's going today? >> reporter: so far so good. the dome is in place, they are lowering it away. it is beginning of what could be a two-day journey to the ocean floor. this has never ...
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