[mom and dad] [laughing] [boy] whoa,whoa,whoa. [mom] you ve got two left feet,boo. well, investigators obviously focusing the efforts on finding those black boxes. but let s look at what happens if they succeed. the question is what happens if they find the recorders? randi kaye reports. reporter: in july, the air france flight takes off from paris. this terrifying video shows the plane on fire as it leaves the runway. the control tower radios the