Something to lighten the mood

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Laugh away. Enlightening! And it was the last pass.
 
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Reactions: AllenB
Yesterday I was sanding some bits square, but they were just never right, I then tested my set-square - shortly afterwards it flu across the room at high speed. Similar to when I used a piece of steel angle whilst gluing a pair of speakers, never presume anything is square.
I did test the set-square when I bought it.
 
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It seems the balloon shot down by the US authorities was at 60,000 feet altitude.
If it was indeed a surveillance unit, the would have a very broad view, several hundred miles, of what was below it.

There are reports of Chinese underwater drones that are on 6 month missions, I wonder what kind of power source is used....they are about 6 feet long, and three broad, maybe a foot thick.
Radio link is there for data.

Not a particularly funny post.