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Steve Jobs's Widow Debuts On Philanthropic Stage

05/17/2013 11:25 am ET | Updated Jul 17, 2013
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Marlene Castro knew the tall blonde woman only as Laurene, her mentor. They met every few weeks in a rough Silicon Valley neighborhood the year that Ms. Castro was applying to college, and they e-mailed often, bonding over conversations about Ms. Castro's difficult childhood. Without Laurene's help, Ms. Castro said, she might not have become the first person in her family to graduate from college.

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