I am sure my grandparents were relived that my dad was working on the  ultra secretive B-29in the USA rather than going over with the ground troops on D-Day. Even so I am sure their prayers for his safety never ceased until the end of the war. At least i can be proud that the B-29 Enola Gay is the airplane that ended the war. He remained in top secret  USA projects until around the 1970,s--like the U-2 and SDI