(May - November 1944) 1st, 5th, 99th and 430th Bombardment Squadrons Deployed to Twentieth Air Force in Tinian (B-29 Superfortress) 331st Bombardment Group (Very Heavy) (November 1944 - April 1945) 355th, 356th, and Bombardment 357th Squadrons Deployed to Twentieth Air Force in Guam (B-29 Superfortress) 98th Bombardment Group (Very Heavy) (25 June-1- November 1945) 343rd, 344th, 345th and 415th Bombardment Squadrons (B-29 Superfortress) Inactivated 18 November 1945 448th Bombardment Group (Very Heavy) (8 September- 4 December 1945) 712th, 713th, 714th, and 715th Bombardment Squadrons Inactivated 4 December 1945 With the inactivation of the 448th Bomb Group, McCook AAF was inactivated and placed in reserve status under supervision of the 2347th Air Force Reserve Training Center. The Airfield closed on 31 December 1945, and was acquired by the state of Nebraska from the War Assets Administration in 1947. In 1950, the city of McCook took possession of the airfield for a municipal airport, however, found that its distant location from the city made it inconvenient. The city of McCook turned the McCook airfield back to the State of Nebraska in 1952. Today the land is owned primarily by farmers and the Nebraska Bureau of Land Management. Most of the concrete runways have been removed except for a 20' strip on the E-W and SW-NE runways. About a dozen World War II-era buildings still exist at the former airfield in various states of deterioration including all the hangars. See also Nebraska World War II Army Airfields References Maurer, Maurer (1983). Air Force Combat Units Of World War II. Maxwell AFB, Alabama: Office of Air Force History. . External links Nebraska's Army Airfields Rural bases Abandoned & Little-Known Airfields: Western Nebraska Image of McCook Army Airfield on Google Maps Webpage of 2Lt. David V. Moll Aviation: From Sand Dunes to Sonic Booms, a National Park Service Discover Our Shared Heritage Travel Itinerary 1942 establishments in Nebraska Airports established in 1942 Airfields of the United States Army Air Forces in Nebraska Defunct airports in Nebraska Airports in Nebraska Buildings and structures in Red Willow County, Nebraska 1945 disestablishments in Nebraska Airports disestablished in 1945