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NASA has verified that the unidentified object that crashed into a Florida home's roof originated from a space station.
(www.infoterkiniviral.com)
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Only one space station as far as I know. The ISS.
https://en.m.wikipedia.org/wiki/Tiangong_space_station
https://en.m.wikipedia.org/wiki/List_of_space_stations
Plus the NRO has flown manned missions we only find out about decades later. So it wouldn't surprise me if they have at least one classified station.
Then you learned something new today, congrats!