The late Robert Hartzell was among four leaders named to the National Aviation Hall of Fame. Announced in December, the four will be enshrined on October 2, 2015. Hartzell, a neighbor of Orville Wright, is recognized for his pioneering work in aircraft propellers dating back to World War I. Also to be enshrined are B-29 mothership and XB-49 pilot Brig. General Robert L. Cardenas, USAF, Apollo 13 mission flight director Eugene (Gene) Kranz, and, the late Abe Silverstein, credited as the “Father of Apollo.”