Orville Ralston, Nebraska's World War I "Ace".   A new exhibit, Pioneering Aviators from Flyover Country, at the Nebraska History Museum at Fifteenth and P streets in Lincoln, opened December 1, 2011. From farm boys testing homemade biplanes in hay meadows near Ewing to World War I aces, barnstormers and lady airmail pilots, our state has long played an important role in aviation history. Artifacts and photographs from the collections of the Nebraska State Historical Society tell the story of Nebraskans in the early twentieth century and beyond who dedicated their lives to the advancement of flight. The exhibit is open through October 26, 2012.