Hillary Clinton's E-Mail Was Vulnerable to 'Spoofing'

Experts say Hillary Clinton didn't take a basic precaution with her personal e-mail system to prevent hackers from impersonating or "spoofing" her identity.

Texting away.

Photographer: Chip Somodevilla/Getty Images)

Hillary Clinton didn't take a basic precaution with her personal e-mail system to prevent hackers from impersonating or "spoofing" her identity in messages to close associates, according to former U.S. officials familiar with her e-mail system and other cyber-security experts.

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