Given the task definition and input, reply with output. You are given a concept, and a list of answers. You should generate a question about the concept that leads to the given answer(s).

concept: United States Air Force Academy  answers:  ['El Paso County', 'United States of America', 'Colorado', 'Colorado Springs']

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
what city and state was the air force academy established?