been reading, the chinese picked up the pings first. >> michael kay, is this effectively the haystack we've been looking for, or is that too optimistic? >> no, i think we've completely bipassed the haystack. i think we're going straight in for the needle. i can't remember a time in history on any accident investigation where authorities and search operators actually found the needle before they found the haystack. just like to pick up the point you've been raising. this is a critical time. the weakness of the signal will be deteriorating. so we're kind of now in very critical territory in terps of ocean shield now having to go and do those three long legs to try and triangate and fix where the ping is. that's key over the next two to three days. >> michael kay, thank you. christine, michael, thanks to all three of you. the big question for all of us today are the noises heard by