talking to marvin kalb about that, we'll get his thoughts coming up. them, a fox news alert. the poilots decreasing the increasing investigation into the malaysian airline. the airliner may have traveled as far forth north as central ad was no accident. david piper has the latest. >> reporter: yes, with the evidence stacking up suggesting that the evidence was the plane was di deliberately diverted, the focus is moving to the passengers and crew. malaysia police have been searching the homes of two pilots of the missing plane and speaking with their families. they took away for analysis a flight simulator the chief pilot had built in his home. they don't believe the pilot is to blame. >> for me, it's not intentionally done by the pilot or anything. it must be controlled by another person or some kind of cop cooperating with the pilot. >> investigators are looking at all the passengers on the plane, very possible link to the aircraft's disappearance. some of them have already been cleared by the investigation, but they're still awaiting background checks on others. they have a