Col. Thomas Riney, 22nd Operations Group commander, tells “A Veteran’s Story,” about Col. Merlyn H. Dethlefsen during the dedication ceremony of the Derby Area Veterans Memorial – Walk of Freedom Nov. 11, 2011, Derby, Kan. Dethlefsen was the third Airman to receive a Medal of Honor during the Vietnam War. (U.S. Air Force photo/ Airman 1st Class Laura L. Valentine)