Did any of you see that cheesy movie from 1980: raise the Titanic? It was about just that. They make it out to be easy, however welding and so-forth propably would not work with haw rusted the wreck is. Do any of you remember the guy who wanted to fill the ship with ping-pong balls? I think you would have a better chance with that, except with the pressure the ping-pong ball would look like a M&M.