Are the pings from Flight 370?

Officials are searching for any sign of the missing Malaysia Airlines Flight 370.

Searchers picked up fresh signals Wednesday that officials hope came from locator beacons attached to the so-called black boxes in the tail of the missing aircraft, which disappeared more than a month ago while carrying 239 people from Kuala Lumpur to Beijing.

If you’ve been following the story, you’ve probably been learning more than you ever expected about "pings".

Jeanne Moos has the story.