recapping new developments. search planes and ships are heading for an area where chinese searchers have twice detected electronic pulse signals in the owner indian ocean. that word from australian authorities who also say that the australian ship "ocean shield" has picked up acoustic noise as well. here's the announcement made a few hours ago. >> this morning we were contacted by the chinese authorities and advised that haixun 01 had late yesterday afternoon redetected the signals for 90 seconds within just two kilometers of the original detection. this is an important and encouraging lead. but one which i urge you to continue to treat carefully.