of the day counts. Armed aircraft crews require ten sorties for each award, while all others require twenty sorties. The United States Secretary of the Air Force approved the "V" Device for Air Medals awarded for heroism in combat effective October 21, 2004. This applies to all Air Force members (Active Duty, Air Force Reserve, Air National Guard), retirees, and veterans. The "V" device is not authorized for wear on the medal for an earlier date. Variants US Air Force The United States Air Force does not utilize numeral devices on the Air Medal. Subsequent awards are annotated with the traditional oak leaf clusters (or OLCs). Enlisted members are also awarded three points toward promotion per award. Each ribbon carries a maximum of four OLCs; the ribbon signifies the first award, a bronze OLC equals one additional award, and a silver OLC represents five additional awards. If there were more than four OLC devices awarded (like the 10th, 14th, 15th, 18th, 19th, and 20th awards), extra Air Medal ribbons were issued to wear the extra OLCs (although only one Air Medal was awarded). Multiple Air Medals were usually earned by aircrew with extensive flight time and long meritorious service records, like during World War II or Korea. The award of the medal is sometimes denoted on a member's gravestone with the abbreviation "AM" followed by an ampersand and the number of oak leaf clusters or "OLC". For example, "AM&5 OLC" means Air Medal and five oak leaf clusters. US Army Air Medal [Army] (1944–1968) The United States Army used the same criteria as the Air Force. Oak leaf clusters were awarded on the Air Medal's ribbon for additional awards – Bronze OLCs for every additional award and Silver OLCs for every five additional awards. Extra ribbons were worn to hold extra OLCs if the recipient had earned more than four OLCs. One award was credited per every 25 hours of combat assault flights (any flight in which the aircraft was directly involved in combat), 50 hours of combat support flights (Visual Reconnaissance or Resupply), or 100 hours of non-combat service flights (Administrative or VIP flights). Flight hours were calculated in six-minute blocks. In 1968 numerals replaced the oak leaf clusters to simplify their display. Air Medal [Army] (1968–2006) During the Vietnam War, the US Army awarded the Air Medal to Warrant Officer or Commissioned pilots and enlisted aircrew for actual