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Avoid loud and aggressive persons, they are vexatious to the spirit. If you compare yourself with other, you may become vain and bitter; for always there will be greater and lesser persons than yourself.

Yet without the jet plane to carry passengers over vast distances at high speed, be they businessmen, holidaymakers, politicians or even whole armies, the world in which we now live would be a very different place.

For millions of people, particularly in the United States of America, boarding a jet plane for a quick journey to a city many hundreds or even thousands of miles away, is very much a routine act.