Underwater hunt for jet black boxes

Crews searching for the missing Malaysia Airlines jet launched a targeted underwater hunt for the plane’s black boxes, with just days left before the devices’ batteries are expected to run out.

The Australian navy ship Ocean Shield, which is dragging a towed pinger locator from the US Navy, and the British navy’s HMS Echo, which has underwater search gear on board, will converge along a 150-mile track in a desolate patch of the southern Indian Ocean.