December 8, 2006 2:38 AM

Undaunted beats heart of the Chiefs: Despite daily radiation treatments, team owner keeps up a grueling schedule with aplomb, goodwill and a winning sense of humor

For the last few weeks, at straight-up five minutes after 3 o'clock, Lamar Hunt has left the plush Thanksgiving Tower in downtown Dallas, or a mountain of paperwork at home, and gone for daily radiation treatments.

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