I-SHIRLEY
As an only child growing up in Lexington, Massachusetts ,Mark Shackleton was rarely frustrated. His dotino
middle-class parents satisfied every whim and he grew up
with only a passing relationship with the word no. Nor was
his inner life disturbed by feelings of frustration, since his
quick, analytical mind sliced through problems with an ef.
ficiency that made learning nearly effortless.
Dennis Shackleton, an aerospace engineer at Raytheon,
was proud that he'd passed on math genes to his son. At
Mark's fifth birthday party, a family affair in their tidy
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