Chicago police and the Secret Service have given another briefing before next week's Democratic National Convention. Officials said it will be safe and successful. More now from WBBM's Terry Keshner.

Photo credit Terry Keshner

<p>Chicago police and the Secret Service have given another briefing before next week's Democratic National Convention. Officials said it will be safe and successful. More now from WBBM's Terry Keshner.</p>
<p>Photo credit Terry Keshner</p>

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