Fear in the C-Suite after UnitedHealthcare CEO gunned down

Corporations are scrambling to protect their senior executives. Boards are reassessing security budgets. And CEOs are being told to delete their digital footprints.

​ Corporations are scrambling to protect their senior executives. Boards are reassessing security budgets. And CEOs are being told to delete their digital footprints. Read More Breaking News, Latest News and Videos | CNN