Robert Arnold, the grandson of Air Force pioneer Gen. Henry “Hap” Arnold, looks on as a Muir S. Fairchild Research Information Center faculty member demonstrates the augmented reality capabilities at the library, Nov. 13, 2019, Maxwell Air Force Base, Alabama. The plaque features a letter written by General Arnold in 1947 and a video of the general appears when used in conjunction with augmented reality software. (U.S. Air Force photo by Cassandra Cornwell.)