“ The Great American Journey ,” hosted by actor and producer Kelsey Grammer , will premiere on Aug. 22, in honor of the 250 th anniversary of the United States independence. “The Great American Journey” will air weekend mornings on NBC’s “The More You Know” and be available to stream on Peacock and NBC.com. Per the official description, “The Great American Journey” will “travel the country celebrating American history and exploring the people, places and ideas that have shaped our nation. The