Tom Clancy's Rainbow Six: Covert Ops Essentials - Operation: Arctic Zebra

Two days ago, a malfunctioning Russian spy satellite made a soft landing near an international Arctic Circle research station. The scientists there were able to recover much of the satellite intact and bring it back to the station. Shortly thereafter, all contact with the station was lost. Subsequent aerial scans of the area reveal evidence of a large armed force now in possession of the station.