The disappearance of the Malaysian airliner is getting more and more mysterious.
Gloria Riviera has the latest on the massive search for any sign of the aircraft.
Nearly a week since flight 370 vanished...sources tell ABC News two clues *could indicate* someone with aviation experience took the plane off course.
The first clue the final data transmission sent at 1:07amthe second the triple-7s transponder which shows where the plane is in the air shut off separately.
After that it could have flown for hours as far as 24-hundred miles from Malaysia.
That explains the massive expansion of the search area farther into the South China Seanad into the Indian Ocean.
Malaysian officials say only all options are on the table
Can you please explain if you have any evidence that would confirm and if so how that the transponder and the ACARS systems were both shut down systematically.
"It could have been done intentionally, under duress, because of an explosion. I do not want to go into speculation."
Today, a senior military official told ABC News, investigators want to eliminate "the possibility, however remote, that the airplane can be used for nefarious purposes against us in the future"
Malaysian officials say they have not yet searched the pilots' homes but are looking closely at everyone on board.
At the mosque the co-pilot attended, friends told ABC's Bob Woodruff he was a great man.
“We always hope they will come back safe"