Much has been made about the reprogramming of Malaysia Airlines Flight 370's flight track.
On March 8, the flight departed Kuala Lumpur at 12:41 a.m.
Sometime before 1:07 a.m., authorities believe the jet's flight path was reprogrammed.
And 12 minutes later, at 1:19 a.m., someone in the cockpit uttered the last words heard from the plane, signing-off to air traffic controllers "All right, good night."
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Now, the search for the flight is becoming a race against time. The so-called black box runs on a battery that allows only allows it to transmit a signal for 30 days.
How close do investigators need to be to the black box in order to pick up its signal?
OutFront, Bill Nye, host of "Bill Nye: The Science Guy." He's also a former Boeing mechanical engineer, and knows a lot about black boxes after working on them while at Sundstrand Data Control.
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