CNN Forensic Files April 10, 2014 08:38:00
What's the latest. we know that they've searched that -- they've narrowed that search area, but it is still slow going as they listen for more sounds, more acoustic events, as they call them, from these black boxes. >> reporter: that's right, christine. a short while ago, i spoke to a spokesperson from the british ministry of defense, who told me that the "hms echo," which is a british vessel, is currently on its way to join the australian vessel, the "ocean shield." she says it's making its way there because the "ocean shield" currently has the most promising leads in this search. she also sa...