Editing Offutt Air Force Base (section)

===Glenn L. Martin Bomber Plant===
{{Main|Glenn L. Martin Bomber Plant}}
[[File:Offutt field - 1940s.jpg|thumb|Offutt in the mid-1940s as a war production plant for the Glenn L. Martin company]]
In 1940 as American involvement in World War II loomed, the Army Air Corps chose Offutt Field as the site for a new bomber plant that was to be operated by the [[Glenn L. Martin Company]]. The plant's construction included a two-mile (3.2&nbsp;km)-long concrete runway, six large hangars, and a {{convert|1700000|sqft|m2|adj=on}} aircraft-assembly building.

Production switched to [[B-29 Superfortress]] very heavy bombers in 1944, and 531 Superfortresses were produced before the end of [[World War II]]. Among these were the ''[[Enola Gay]]'' and ''[[Bockscar]]'', the B-29s that dropped the [[Atomic bombings of Hiroshima and Nagasaki|first atomic weapons to be used in a military action]] (against the cities of [[Hiroshima]] and [[Nagasaki, Nagasaki|Nagasaki]], Japan).

Production ended on 18 September 1945, when the last B-29 rolled out of the assembly building. With the manufacturing plant's closure, custody of the airfield and ground facilities were assumed by the 4131st Army Air Force Base Unit, Air Materiel Command.