New :
The PX-15 Ben Franklin    Erwin Aebersold, engineer in submarines

and its designer and engineer
      Erwin Aebersold (clic on the name)
                Erwin Aebersold, engineer in submarines

click on following link to see the film : Disappearance of the PX-15
"The PX-15 Ben Franklin... and its engineer Erwin Aebersold"...