This report contains three studies. The first study presents the new American national security doctrine of September 2002.The United States is to conduct the fight against terrorists and weapons of mass destruction together with other states. Pre-emptive war is one element in this doctrine. A new paradigm in nuclear doctrine rejects mutual assured destruction and advocates missile defense and reduction of nuclear forces. The second study deals with US troops in Europe and the form and content of such American presence over time. The RMA and its impact on the presence is analyzed. Its impact is small except for the technology gap and coalition warfare. Because opf its high technological standard Sweden adjusts better to the American RMA than many NATO allies. The third study deals with the European security and defense policy, ESDP, and how it is perceived in the United States. While president George Bush was very sceptical the Clinton administration was conditionally positive. President George W. Bush was negative in the beginning but now perceives the ESDP as rather irrelevant. The reason is that the European centric, especially French, plans to imagine the ESDP as an alternative to NATO in European security policy, has been weakened considerably. This outcome is explained by the lack of resources and the preference of many European states to use NATO as the central European security institution.