Solid State Type Environment News Today

What are the changes that have been made to air travel after the past plane disasters, david, do you think? >> well, lets talk about the black boxes for a second. like mary said, they have advanced to about 1970 when they went to -- i guess 76 when they went to a all-digital solid state type environment. before that it was a metal tape that actually scratched the altitude in to this metal tape. so theres been advancements, but since 1978, which is when the deregulation act went in the place it h...