Thunder in the Sky | Inside the World’s Greatest Flying WWII Collection This is Thunder in the Sky. A brand-new 10-part series. We take you inside the National Museum of World War II Aviation in Colorado, where the History’s Greatest Aircraft team has been given exclusive, behind-the-scenes access to one of the most extraordinary aviation collections in the world. This is no ordinary museum. Every aircraft here flies. From the people who built it, to the team that keeps these machines alive, we