not expected to malaysian airlines 370. why not? i want to bring in rob mccollum ocean specialist and expedition leader. so there have been 10 planes searching today. the australian crew calls four new objects a promising lead. boy, have people been disappointed in the last few days. there has been satellite imagery, a plane who spotted objects and come to find out it ends up being debris or crash. how promising do these objects sound to you, six feet in length? >> here is hoping. every day we ride this roller coaster. it's hard for people to understand why is it so difficult. i think there's a number of things we can glean out of the last few days. the first, the ocean is a vast body of water. we're used to hearing cliched

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