"Progress M-34 was a Russian unmanned cargo spacecraft which was launched in 1997 to resupply the Mir space station, and which subsequently collided with Mir du

"Progress M-34 was a Russian unmanned cargo spacecraft which was launched in 1997 to resupply the Mir space station, and which subsequently collided with Mir during a docking attempt, resulting in significant damage to the space station." https://en.wikipedia.org/wiki/Progress_M-34 https://en.wikipedia.org/wiki/Progress_M-34 Edit. Some more detail here: https://en.wikipedia.org/wiki/Mir#Shuttle.E2.80.93Mir https://en.wikipedia.org/wiki/Mir#Shuttle.E2.80.93Mir and here: https://en.wikipedia.org/wiki/Mir#Accidents https://en.wikipedia.org/wiki/Mir#Accidents