I'm very sorry, it's never easy losing a close family member. Your Dad was the real definition of a hero being in the first Army at Normandy. I just read a book about them at Normandy. They took the heaviest losses and if it wasn't for them the war could have been lost during that invasion or made to last a lot longer. Very few tanks made it to shore that day,and the few that did led the breakout off the beach, your Dad was very lucky.