retired australian air chief leading the search effort. stressing how important the pulse detection is but as you heard, at the same time tempering hopes that we could be on the verge of some important answers. >> as we've had had two major developments overnight. first, flight 370 may have been flown in such a way as to deliberately avoid radar detection. that's coming from malaysian authorities this morning. a british search vessel is racing to the area where the pulse signal was detected twice. let's talk about this with the senior manager of metron scientific solution and a former naval oceanographer and cnn correspondent richard quest. >> start with you, captain. is it possible -- and when you look at social media, facebook and twitter, and even our conversations in the newsroom -- is it possible that these sounds