first plane to land on the field, on 31 March. The main runway was officially opened on 23 May. Fort Glenn's first runway was then the U.S. Army's most westerly airfield in the Aleutian Islands." The first operational unit, the 11th Fighter Squadron, moved into Fort Glenn with P-40 Warhawk fighters on 26 May from Elmendorf Field. Additional construction continued throughout 1942 with four × runways were completed (06/24, 07/35), two of which (03/21, 04/22) were situated only 10 degrees apart. All runways had four layers of asphalt laid down over the PSP. Two additional emergency landing fields were built, one on the north coast of the island (North Shore) , 9.4 miles north; the other 7.7 miles to the west-southwest of the base near the Tullk Volcano (Pacifier) . Morrison-Knudsen Construction Company built hundreds of Quonset hut structures on the base, replacing the temporary tents which exposed the construction crews to the sudden storms which swept the island frequently. Housing and messing facilities for 119 officers and 359 men were constructed as well as recreational and service buildings. Storage facilities consisted of 6,975 square feet for general stores and a 150-cubic-foot freezer. Buildings for aircraft included a kodiak-type hangar, x , a squadron warehouse, and a terminal for air transport service. Administration offices were housed in five buildings with a total floor space of 3,850 square feet. Radio facilities included a transmitting station, a direction-finder station, and a radar station, all with separate power houses, and with housing and messing provisions for personnel. The hospital, located in one small building, contained eight beds. The maintenance force of the station was installed in seven buildings. Electric power was provided by three diesel-electric generators. Aleutian Islands campaign On 3 June 1942 the Imperial Japanese Navy launched two aircraft carrier raids on the United States Army barracks and the US Navy base at Dutch Harbor on nearby Amaknak Island. The attack was a surprise, but the base been on alert for an attack for many days, although there was no specific warning of the attack before the Japanese planes arrived over Dutch Harbor. The attack signaled the beginning of the Aleutian Islands campaign. In response, the P-40s of the 11th Fighter Squadron from Fort Glenn AAB along with Naval land-based fighters attacked the Japanese aircraft. Eleventh Air Force also dispatched aircraft from Elmendorf Field. In the ensuring battle, the United States Navy