What is the relationship between flying and aviation in the context of the input sentence. Choose an answer from: product/material produced; manufacturer; distributed by; industry; position held; original broadcaster; owned by; founded by; distribution format; headquarters location; stock exchange; currency; parent organization; chief executive officer; director/manager; owner of; operator; member of; employer; chairperson; platform; subsidiary; legal form; publisher; developer; brand; business division; location of formation; creator.

I don't really believe for one second that my well-trained and qualified professional friend and his aviation peers spend the short amount of time they are actually flying their planes themselves seized in the grip of abject terror.

Answer: industry