Senior Airman John Maness sings "Muddy Water" during the Air Mobility Command Icon finals competition Oct. 20, 2011, at Scott Air Force Base, Ill. Maness made it to the finals by winning the base level competition at Grand Forks AFB, N.D. Icon is an AMC commander's initiative to showcase the vocal talents of AMC airmen. Each AMC base holds Icon contests in July and August to determine their representatives for the command final which takes place at Scott AFB.