Sources tell CNN it appears that Malaysia Airlines Flight 370 disappeared from military radar for about 120 nautical miles.
According to a senior official with the Malaysian government, the absence from radar means it likely dipped below an altitude of 5,000 feet.
Malaysia Airlines plane search: New possible signal detected
What would have caused the drop in altitude? And how dramatic of a drop would it be for the plane to make?
CNN's Martin Savidge is in the flight simulator to demonstrate how an altitude drop would play out.
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