I caught this last night on my PBS station and really enjoyed it. http://www.pbs.org/wgbh/nova/military/dday-sunken-secrets.html
You're welcome. Fascinating to see all of those old ships, tanks, etc. at the bottom of the Channel, covered in barnacles, etc. They even had some veterans who had served on some of the ships go down and look at them.
I have been meaning to post a link for this. I saw it about a week ago. It's a fascinating program & I highly recommend it. The technology that they have for doing underwater survey and investigation is truly amazing. https://www.youtube.com/watch?v=vxgEOMlYG_g