CNN CNN Newsroom January 3, 2015 21:08:00
Be 20,000 feet or higher to be visible by radar. >> when the -- les, when the black boxes, the data recorder et cetera are found and the cockpit voice recorder are found. it could take years, it could happen this week. but when it happens, what is the single most critical information we can glean from that? >> i would start with altitude. what the variance was between the time that altitude was requested and then we lost contact with them when that request was denied. or they were given that cle...
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