The device that might lead crews to Flight 370

Hopes are running high that a series of pings picked up over the weekend came from Flight 370's black boxes. The batteries that power those locator beacons are expected to work for about 30 days. That means they may have already fallen silent. Randi Kaye visited a manufacturer that makes the beacons that might be on the doomed plane.

Anderson discusses the search for those pings with David Gallo, who co-led the search for Air France Flight 447 and CNN Safety Analyst David Soucie.