Where’s he (and wife and sister in law) buried?
At sea.
https://www.findagrave.com/memorial/5947/john-f-kennedy
https://www.findagrave.com/memorial/5948/carolyn-bessette-kennedy
https://www.findagrave.com/memorial/5949/lauren-gail-bessette
https://www.bridgemanimages.com/en/noartistknown/uss-briscoe-stands-off-shore-during-burial-of-kennedy-crash-victims-1999-07-22-photo/photograph/asset/8420118