President elect Barack Obama is to appear in a public service ad on behalf of US charity ServiceNation to promote a child mentoring campaign.Obama will appear in a press and online campaign above the headline "Be the change. Mentor a child".There may also be a companion video clip that can be watched online. The campaign, produced on behalf of ServiceNation.org, is timed for National Mentoring Month, which has been observed each January since 2002.
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