 The Kirov Factory and Omsk Transmash design bureau (KBTM) produced T-80 tanks from the 1970s, and were responsible for the BTR-T, TOS-1, and the prototype Black Eagle tank.Omsk Transmash declared bankruptcy in 2002.In the 1950s, following the development of the oil and natural-gas field in Siberia, an oil-refining complex was built, along with an entire "town of oil workers", expanding Omsk northward along the Irtysh.