Utilize the input text as a context reference, choose the right relationship between flying and aviation from the options. Options: 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.

The aviation sector will have to act fast to stop pilots from flying aircraft if they are on anti-psychotic drugs.

Answer: industry