Although not part of the D-Day invasion, perhaps we can spare a thought on the death of the last serving US Senator who served in WWII
http://en.wikipedia.org/wiki/Frank_Lautenberg
Died 3 Jun 2013
Served in the US Army Signal Corps from 1942-1946. Probably won't have any more Senators who served in that war.
26% of current Senators ever served in the US Military.
20% of the Current Hose served in the US Military
http://whoserved.com/senate.asp