This goes through the muddled history of time zone and the emergence of GMT and UTC. I have heard the story before, so on one hand it was refreshing but on the other I can see it has little significance to people born this millennia. I felt the Atomic clocks in Jumbos actually did give me new information as I did not get previously that one was flying with and the other against the earth's rotation.
In general I am not that happy with my standard of reading given I have put so much energy to improving.
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