CNN The Situation Room April 9, 2014 21:51:00
Challenge, wolf. the darkness,s depth of the ocean in the area, the topography all present major on straks. two more signals detected which could come from the missing plane's black boxes. now search teams are trying it refine the location. find more signals. tighten the search area. >> and hopefully in a matter of days we will be able to find something on the bottom that might confirm that this is the last resting place of mh-370. >> reporter: but the challenges still enormous. after the 2009 air france crash in the atlantic, that search area was also narrowed down, but a veteran of that oper...
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