521st may refer to:
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521st Air Defense Group
The 521st Air Defense Group is a disbanded United States Air Force organization. Its last assignment was with the 31st Air Division at Sioux City Municipal Airport, Iowa, where it was inactivated in 1955. The group (military aviation unit), gro ...
, disbanded United States Air Force organization
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521st Air Mobility Operations Wing
The 521st Air Mobility Operations Wing (521 AMOW) is part of Air Mobility Command and is stationed at Ramstein Air Base, Germany. It coordinates logistical air movements into, out of, and through Europe.
The 521st AMOW expedites warfighting a ...
(521 AMOW), part of Air Mobility Command, stationed at Ramstein Air Base, Germany
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521st Fighter-Bomber Squadron
The 521st Fighter-Bomber Squadron is an inactive United States Air Force unit. Its last was assigned to the 415th Bombardment Group, stationed at Dalhart Army Airfield, Texas. It was inactivated on 5 Apr 1944.
History
Established in early ...
, inactive United States Air Force unit
See also
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521 (number)
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521
Year 521 (Roman numerals, DXXI) was a common year starting on Friday of the Julian calendar. At the time, it was known as the Year of the Consulship of Justinian I, Sabbatius and Valerius (or, less frequently, year 1274 ''Ab urbe condita''). ...
, the year 521 (DXXI) of the Julian calendar
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521 BC
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