CIA not ruling out terrorism on Flight 370

Four days after the Malaysia Airlines Flight 370 went missing, there is still no sign of the plane.

According to a Malaysian air force official, the plane was way off course when it disappeared. It's forced authorities to shift the focus of their search. They're now looking at areas hundreds of miles from the original flight path.

Here's what we know:
-The passenger jet took off from Kuala Lumpur on Saturday at 12:41 am local time heading for Bejing.
-About an hour into the flight, the transponder was either turned off or stopped working.
-The plane changed course, which the Malaysian Air Force says it knows from radar, since the transponder was off.
-At 2:40 a.m. local time, radar lost track of the jet.
-At that moment the plane was off the island of Pulau Perak.

Another significant development: CIA Director John Brennan refusing to rule out terrorism as a possible cause of the plane's disappearance.

OutFront with his take: Jeremy Bash, former Chief of Staff at the Department of Defense and the CIA.