great rush. then we would need to bring in more equipment, an rov. that would go down to retreat the black boxes, all large pieces of wreckage for forensic examination. >> captain darby, these are hopeful scenarios. these are ifs, if the pulses can be redetected, if the pulses turn out to be the black boxes. a lot of pope here. >> it is. if it a true ping, it's well founded. they have been extremely lucky to find out or had information others didn't have. somehow we took hundreds of thousands of square miles and brought it down to a pinpoint as the gentleman said. i'm excited if it's a ping. if not, we're back to where we started. >> all this hope shrouded by scepticism. hearing from nic robertson, out

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