How does a modern jetliner vanish without a trace?

Aired: 3/10/2014 | 0:07:51 | Clip
There are still many more questions than answers in the mysterious disappearance of Malaysia Airlines Flight 370. Judy Woodruff asks former NTSB investigator Alan Diehl and former NTSB board member John Goglia to speculate on different known factors and possible theories.

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