Good morning children - that is all of you so called professionals who couldn't be bothered to answer, from your knowledge of ATC, a perfectly simple question but preferred to behave like a gang of seven year olds in the playground.
Isn't it wonderful how people - under the anonimity of the Web - find it so easier to demean themselves with yah- boo stupidity than behave like adults and use the Forum for its purpose.
Years ago aviation professionals were happy to share knowledge and develop interest in the industry. Now, judging by this and the similar previous thread, the attitude is "we know it all, don't ask daft questions and don't dare to point out how unhelpful we are."
Perhaps if those who wrote the trash answers to my posts, re the chemtrails post, had taken the time to answer the OP (always assuming of course that they have any knowledge of ATC) they might have gained some respect instead of proving just how puerile so called adults can be.