Norwegian Airports Close as Air-Traffic Controllers Halt Work.

Is a strike a legitimate tool for air traffic controllers? I know it's used in many parts of the world by controllers with grievences against their employers - and not allowed (but still used) in others.

Since this blog is my little soap-box, you shall now have my opinion: If the employer is a government, the controllers should not be allowed to strike - if the employer is a private or quasi-private concern which has as one of its aims the generation of a profit, the controllers can and ought to use strikes to maintain decent working conditions.

Any thoughts?