The International Space Station may one day be forced to return to Earth, so that it safely burns up over the ocean, and this is actually a surprisingly complicated task given the huge mass of the station and the limited propulsion available.

The plans aren't final by any means, but this discusses the problems and one particular option using multiple progress spacecraft to augment the propulsion and propellent available for deorbiting this historic orbital facility.

Some diagrams and figures are from the paper
"ISS CONTROLLED DEORBIT: CHALLENGES AND SOLUTIONS"
Rafail Murtazina, Evgeny Menkinb, Charles Gray, Alexander Ovchinnikovd, Konstantin Grigorjeve
https://www.researchgate.net/publicat...

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