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The most passengers on board that plane. as we look at these pictures we cannot forget the 239 passengers and crew and the 239 families anderson watching this very closely. >> yeah, still waiting for answers. david malco, appreciate your reporting. tom foreman jinz oins me. >> just as we have been looking at the piece of debris all afternoon so have the experts at boeing. they have looked at the 7 foot by 3 foot piece. they see something in these pictures that tells them it's likely part of a 777. that's what the missing malaysia airplane was. what sort of part. let's roll it around and talk a...

Tightened to ensure daily, random cell checks and weekly security inspections. deborah feyerick cnn, new york. after a historic trip across the western pacific ocean, a solar-powered airplane is gearing up for the next leg of its global journey. the solar impulse 2 landed in hawaii friday completing the longest and most difficult part of its mission. its next stop is the city of phoenix, arizona. our david malco has more on the expedition. >> reporter: extraordinary moments as the solar impulse 2 touched down on the tarmac in hawaii after a flight that lasted almost five days and five nights...

Scenario. if for some reason they need to jump out of the aircraft, leave it behind, parachute it down and inflate a life fwoet boat they have trained for. that that being said, everything coming from them and their entire team is all about excitement. they are looking forward to the journey. they are feeling good about it. wanting to break some records. wanting people to watch, feel good and be inspired about clean energy. even with this technology, they are no different from explorers of the past. >> great point. they are no different than explorers from the past who took great risks to make...

We could easily build a pinger detector so we would run out and detect pingers. you'd have to download the data but it would be geo referenced so you'd know where the ping came from. these tools you can launch from multiple boats. >> david malco reported that the conditions are murky, the sea is churning and royaling and that it's a mess under there. does that matter? >> it does for visual but for pinger and side scan sonar, it does not matter. you can use these tools in murky water. >> miles, the notion that we are still in this boat, i hate to say it, that we're actually using the same kind ...

On sunday. the ministry of transport saying they rearranged their schedule. if they had come and made the request to fly on sunday it would have been easy paperwork issue to sort out. it's one piece of information for investigators at this point. the investigation should take a week or two. airasia says it's cooperating. doesn't bode well for being called out of having a serious violation of an agreement, ashlee . >> i think you're dead on there. david malco, thank you for that. want to call in my experts, tim taylor and miles o'brien, former cnn anchor and correspondent and faa expert. ther...