Former NTSB member Dr. Vernon Grose tells me in an interview for 1010 WINS that there are only two possibilities for an aircraft to suddenly disappear without warning from radar. A catastrophic failure of the Boeing 777 - which he says is quite unlikely - or a terrorist attack. He says we might not know for certain what happened until what we commonly refer to as the "black boxes" are recovered. They have the ability to ping a signal in water, he says, for six years.
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