258834
Although satisfactory , the RP-70 was not produced ; instead , the improved RP-76 was developed , flying in 1959 and being produced for both the U.S. Air Force and Navy , becoming the AQM-38 in 1962 .
 U.S. Air Force
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 U.S. Air Force