sentences:  There is no agreement between the United States and Russia to use United States-built submarines nor to use nuclear-powered submarines for transporting supplies.In 2002, Nornickel was the largest volume of shipping for the Murmansk Shipping Company along the Northern Sea Route.Starting in 2002, MMC Norilsk Nickel began purchasing gold mining assets, which were spun off in 2005 as Polyus Gold.