Assertion: group | /r/CapableOf | assume operation
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text: The group was redesignated the 56th Fighter Group (Air Defense) and replaced the 501st Air Defense Group at O'Hare IAP on 18 August 1955, assuming the 501st's air defense mission and operation of USAF base facilities at O'Hare as part of ADC's Project Arrow, which was designed to bring back on the active list the fighter units which had compiled memorable records in the two world wars.