After 41 years and over 8,000 episodes, Pat Sajak's final turn as the renowned host of "Wheel of Fortune" will air on Friday. Sajak's co-host and letter-turner Vanna White paid an emotional tribute to her partner on Thursday's episode, calling him "like a brother" and a "true lifelong friend." In the pre-recorded video that featured clips and photos of their 41 years as co-workers, she added that their personal friendship has meant even more than their professional collaboration. White's heartfe