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In 1956 , the B-26 was reaching the end of its operational USAF service , and the squadron was re-equipped with RF-80A Shooting Star daylight reconnaissance aircraft that were also nearly obsolescent .
 organization: USAF
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
 Entities: USAF 
Answer:
 organization: USAF