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Richard P. Feynman

This person is the author of the book and is a world-renowned physicist.

Arlene Feynman

This person suffers from tuberculosis of the lymphatic gland.

Mel Feynman

This individual is central to their child's development as a scientist and mathematician.

Gweneth Feynman

This person is the author's third spouse.

William Graham

This individual is the head of NASA and a former student of the author.

William P. Rogers

This person was the secretary of state under President Nixon.

Sally Ride

This person is a scientist, astronaut, and fellow member of the Challenger Commission.

Neil Armstrong

This person is an astronaut, aeronautical engineer, and fellow member of the Challenger Commission.

General Kutyna

This person heads the accident investigation portion of the Challenger Commission.

Carl and Michelle Feynman

These characters are the children of the author of the book.

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