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Happy 75th birthday, Mark Harmon! See the 'NCIS' star's life in photos

9 verified updates • corroborated by 2 independent sources • tracked since September 2, 2026

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  Sep 02, 07:01 AM 1 source: Detroit Free Press

  Happy 75th birthday, Mark Harmon! See the 'NCIS' star's life in photos
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  Sep 02, 10:01 AM 1 source: freep.com
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  Sep 02, 10:31 AM 1 source: Detroit Free Press
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  Sep 02, 12:31 PM 1 source: freep.com
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  Sep 02, 02:01 PM 1 source: Detroit Free Press
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  Sep 02, 05:31 PM 1 source: freep.com
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  Sep 02, 06:01 PM 1 source: Detroit Free Press
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  Sep 03, 12:31 AM 1 source: freep.com
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  Sep 03, 01:31 AM 1 source: Detroit Free Press