would have multiplied the difficulty and cost of intercepting the real warheads. SDI design and operational planning had to factor in these countermeasures and the associated cost. Response from the Soviet Union SDI failed to dissuade the USSR from investing in development of ballistic missiles. The Soviet response to the SDI during the period of March 1983 through November 1985 provided indications of their view of the program both as a threat and as an opportunity to weaken NATO. SDI was likely seen not only as a threat to the physical security of the Soviet Union, but also as part of an effort by the United States to seize the strategic initiative in arms controls by neutralizing the military component of Soviet strategy. The Kremlin expressed concerns that space-based missile defenses would make nuclear war inevitable. A major objective of that strategy was the political separation of Western Europe from the United States, which the Soviets sought to facilitate by aggravating allied concern over the SDI's potential implications for European security and economic interests. The Soviet predisposition to see deception behind the SDI was reinforced by their assessment of US intentions and capabilities and the utility of military deception in furthering the achievement of political goals. In 1986 Carl Sagan summarized what he heard Soviet commentators were saying about SDI, with a common argument being that it was equivalent to starting an economic war through a defensive arms race to further cripple the Soviet economy with extra military spending, while another interpretation was that it served as a disguise for the US wish to initiate a first strike on the Soviet Union. Though classified at the time, a detailed study on a Soviet space-based LASER system began no later than 1976 as the Skif, a 1 MW Carbon dioxide laser along with the anti-satellite Kaskad, an in-orbit missile platform. With both devices reportedly designed to pre-emptively destroy any US satellites that might be launched in the future which could otherwise aid US missile defense. Terra-3 was a Soviet laser testing centre, located on the Sary Shagan anti-ballistic missile (ABM) testing range in the Karaganda Region of Kazakhstan. It was originally built to test missile defense concepts, In 1984, officials within the United States Department of Defense (DoD) suggested it was the site of a prototypical anti-satellite weapon system. In 1987 a disguised Mir space station module was lifted on the