shield," the american provided blue fin 21. the narrower the search field the easier it's going to be for them to be able to gounds nooet the water and find the actual wreckage. very promising developments here in australia. but again, they're still -- while they're saying they're promising signals they do still need to determine whether or not these are, in fact, from the missing plane. kate? >> let's dig deeper on this latest news just coming in with mary schiavo and attorney who represents victims and families after airplane disasters. and david gallo, co-leader in the search for air france 447 and director of special projects. good morning to both of you. mary, let me get your take real quick on what erin was just reporting. i hope you were able to hear her. >> right. >> i believe this was the first time we've had a sonar detection, acoustic detection from one of the planes from the