Air Crash Investigation - What Happened to MH370 Full National Geographic Documentary

On March 8, 2014, at 1:19 a.m., someone spoke those last words from Malaysia Airlines Flight 370 to air traffic controllers before the Boeing 777 vanished.

A year later, searchers have no new clues as to where it went with 239 people on board.

Radar and satellite reports have provided hints, but searchers still have nothing to hold in their hands. No wreckage seen floating at sea or beached on shore. No fuselage resting on the sea floor.

Experts have said the data indicate the flight path from Kuala Lumpur, Malaysia, to Beijing unexpectedly veered, putting the commercial jet over the southern Indian Ocean.

But the water's vast and intricate depths have revealed no secrets. And as clarity has eluded grasp, analysts have made many speculations about what happened.

The most controversial idea: Is the maritime search area all wrong? Did the plane land clandestinely on solid ground?

-CNN-