Also caught it last night, will have to view the first episode.
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You certainly can't imagine an aircraft being allowed to fly for 12 months with multiple engine failures these days.
Seeing the shots of the 747-8 made me wish I had the time and the free cash flow to seek it out and fly on it just because it is the latest and last generation of the mighty 747.
I flew it on Lufthansa, unfortunately on the main deck. A bit disappointed to find that the experience wasn't much different from the old birds, except everything was noticeably newer.