Like most Americans, Christine Kuehn always mourned the tragedy at Pearl Harbor, haunted by the some 2,400 souls who perished in the stunning Dec. 7, 1941, attack.

She even made the hallowed site a priority during her 1989 Hawaiian honeymoon, solemnly sailing toward the USS Arizona Memorial and reflecting on the carnage that shaped history.

“You think to yourself, ‘How awful for the families that were destroyed.’ It was the first time we’d ever really been attacked on our home soil,” Kuehn told The Post ahead of the anniversary.

“Everybody’s kind of in their own head, thinking about how many souls were lost, how many men were sacrificed. You think, ‘How could this happen?’ ”

Kuehn was “blissfully ignorant” about her family’s shocking secret.

But when a mysterious letter arrived years

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