When Neil Armstrong died in a Cincinnati hospital two weeks after undergoing heart surgery in 2012, his family released a touching tribute addressing the astronaut's millions of admirers around the globe.

"Honor his example of service, accomplishment and modesty," they wrote, telling fans of the first man to walk on the moon that "the next time you walk outside on a clear night and see the moon smiling down at you, think of Neil Armstrong and give him a wink."

But in private, the family's reaction to his death at 82 was far stormier. His two sons contended that incompetent

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