New clues are emerging Wednesday as the investigation into the disappearance of Malaysia Flight 370 expands by air, sea, and land.
Investigators are zeroing in on an area the size of Texas in the south Indian Ocean, where satellite data suggests the plane may have gone.
"I mean, you're on your way to Antarctica at that point," retired Marine Col. Steven Ganyard said. "The good news [is] we have the Australians with the NTSB [National Transportation Safety Board] now in charge of this investigation."
Military officials in Thailand now say radar data shows an unidentified plane, possible Flight 370, minutes after the Malaysian jet's transponder signal was lost.
If they plane was hijacked as signs indicate, how might it be used in the future? CBN News Terrorism Analyst Erick Stakelbeck explains more, on CBN Newswatch, March 19.
Thai officials said they didn't share the information earlier because no one asked for it.
Meanwhile, the search for answers continues unabated. Officials say if the plane was in trouble, it didn't send any signal.
"There were a number of distress beacons on board the aircraft, and we know they have not been activated because we are the receiving authority for such alerts," John Young, with the Australian Maritime Safety Authority, said.
The investigation into why the flight vanished has taken another strange turn: investigators can't rule out catastrophic system failure, but they say all signs point to a deliberate act.
Theories abound as to the fate of the Boeing 777 jetliner and its passengers, including speculations by pilots posted on the Internet.
One post suggests an electrical fire erupted in the cockpit and the aircraft's abrupt turn westward may mean the pilot was attempting to land at the nearest airport.
Another pilot with 25 years' experience believes the facts point to a terrorist hijacking. He said the plane could be on the ground somewhere being loaded with bombs or even chemical weapons to be used in a future attack.
Meanwhile, two Malaysian fishermen told local police they saw a jumbo jet flying low over the waters between Malaysia and Vietnam at about the time the airliner would have been in the area.
Malaysian officials say the top priority remains finding any of the debris from the plane, something many say is tantamount to finding a needle in a haystack.
Police are continuing to investigate the plane's pilots.
Malaysian officials say files were recently deleted on a flight simulator found at the captain's home.