 Complete the following phrase:  On February 7, 1991, the Soviet Salyut 7 space station , with the Kosmos 1686 module  attached, reentered and scattered debris over the town of Capitán Bermúdez, Argentina. The station had been boosted to a higher orbit in August 1986 in an attempt to keep it up until 1994, but in a scenario similar to Skylab, the planned 