Anchored by Jake Tapper, The Lead airs at 4 p.m. ET on CNN.
What's the U.S. plan on Russia's "all out" invasion? Plus, a look at the strategy for fighting ISIS.
(CNN) – New information emerged over the weekend about the movements of Malaysia Airlines Flight 370 on the night it vanished.
Military radar tracking shows that after making a sharp turn over the South China Sea, the plane changed altitude as it headed toward the Strait of Malacca, an official close to the investigation into the missing flight told CNN.
The plane flew as low as 12,000 feet at some point before it disappeared from radar, according to the official.
The sharp turn seemed to be intentional, the official said, because executing it would have taken the Boeing 777 two minutes - a time period during which the pilot or co-pilot could have sent an emergency signal if there had been a fire or other emergency on board.
Given new information, can investigators rule out the possibility that the plane was in some way sabotaged or hijacked?
CNN aviation analyst Jim Tilmon, and former National Safety Transportation Board official Alan Diehl weigh in.