Mark Harmon, the beloved 72-year-old actor known for his role as Leroy Jethro Gibbs on *NCIS*, is facing serious health challenges, raising concern among fans and the entertainment industry. With a career spanning decades, Harmon has captivated audiences through roles in *St. Elsewhere* and *NCIS*, becoming a symbol of strength and integrity. Fans have flooded social media with messages of love and support as details about his condition remain private….
