Authorities tell CNN that Malaysia Airlines flight 370 was traveling hundreds of miles off course, and in the opposite direction from its original destination before it disappeared.
But still, no answers as to where the plane is now or how it went missing.
The wait for news has been agonizing for the families of the passengers and crew.
Among them, three U.S. citizens, including Philip Wood. His brother told CNN that the family is "just relying on faith."
CNN's David McKenzie is in Beijing where many of the waiting family members have gathered - with the latest.