Periodic report on the national emergency with respect to the Russian Federation : message from the President of the United States transmitting a 6-month periodic report on the national emergency with respect to the risk of nuclear proliferation created by the accumulation of weapons-usable fissile material in the territory of the Russian Federation that was declared in Executive Order 13159 of June 21, 2000, pursuant to 50 U.S.C. 1641(c).