237 SJ
knowing someone has died but you cant find any bit of him - I would perhaps not say - unidentified
or else one if forced to say the cenotaph is full of unidentified men
https://www.dailystar.co.uk/news/latest-news/643029/september-11-victims-identified-twin-towers-conspiracies-world-trade-center-anniversary
that site is a bit Breitbartie - "no one knows why so many werent found". Actually we do - the free fall speed of the building was around 200 mph ( or km h-1 ) actually it doesnt matter which
and amongst girders bits of concrete in free fall the bodies were ground to nothing ness.
( all the jumpers had their clothes ripped off in free fall)
and no one knows why the building fell vertically
(yes we do if you weigh a megaton all you can do is fall vertically as there is no turning moment)
and no one knows why there was so little rubble compared
( yeah we do that - a megaton that high is around 90% air and 10% stuff or material - so it collapses down to 10% volume.......)
The last two predicted by Kelvin - yeah famous kelbin in 1890