you can control your own body clock. it is not difficult to adjust to a new time zone. adjusting your watch can help you avoid jet lag. there isn't much you can do to avoid jet lag.
It is the jet stream that affects how fast airplanes fly Planes go slower when they are moving with the wind It takes more time to fly from NY to London than from London to NY The jet stream always blows from the east to the west across the Atlantic
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