Karen Klein: Generosity in wake of bus bullying hasn't "sunk in"

      |The video of 68-year-old bus monitor Karen Klein getting bullied by a group of 7th graders inspired a nation to send letters of encouragement - and over $500,000 in donations. Klein and her son, Brian, joined the "CBS This Morning: Saturday" co-hosts to talk about the generosity toward her in the wake of the incident.

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