"The issues surrounding the weaponization of outer space present difficult security and diplomatic challenges to the United States in its relationship with foreign states. [...] First, many space technologies have dual-use capacity, making it difficult for states to distinguish between defensive and offensive preparations or conventional and space weapons. Second, some defense analysts argue that space weapons are inherently better suited to offensive than defensive warfare since they are able to launch powerful attacks quickly but are vulnerable to attack. Third, due to insufficient situational awareness in space and poor 'forensic' ability, the causes of satellite failures can be unclear, creating the potential for both anonymous attacks and groundless accusations of antisatellite (ASAT) attacks. Finally, as in many areas of foreign policy, states often send mixed signals regarding their true intentions in space. This article explores the range of possible interpretations of US policy and Chinese policy on space weaponization."
Strategic Studies Quarterly: http://www.maxwell.af.mil/au/ssq/index.asp
Strategic Studies Quarterly (Spring 2008), v.2 no.1