really about the investigation into who may have been involved or what may have been the motives. they are holding those cards very close to their chest. the only thing they are revealing is how this search is going and they are saying before we can go ahead with any kind of investigation, tell you people anything, we need some hard evidence. that's the flight data recorders. is this a link to those recorders? is this a link to unraveling the mystery of flight 370? well may be about to find out, carol. >> i know. i'm keeping my fingers crossed by. i want to bring mary schiavo back in to talk about the debris, the debris that investigators think that's important. the reason they think it's important is because of the shape and color. >> that's right. >> the circular object is gray or green and rectangular object is orange. why is that important >> gray/green is the color of the inside of the aircraft. metal and other pieces are of a