if the former managing director of the the national transportation safety board. thank you for being with us. so this is what we know about what the chinese say they've heard. twice, two times, electronic pulse signals, the second time they heard it, it was two kilometers from the original, and it lasted every second they heard something every second for 90 seconds. what do you make of that? >> i think it's very compelling. and particularly that they picked it up a second time. it's not uncommon that both of the black boxes, the voice recorder and the data recorder, you know, are located near each other, so that they picked up a second ping and held it for the for 90 seconds is very compelling. i agree with the air marshall houston that you can not jump to conclusi conclusions, but boy, this is an