I have read in the newspapers that foreign citizens, when travelling to the United States on a Visa, will undergo a data registration and have their fingerprints taken. Not willing to submit myself to this treatment, I decided therefore to cancel my guest lectures at New York University for March 2004. At this time, I would like to provide reasons for my decision – a decision that I find necessary and unavoidable in spite of my sympathies for American students and professors with whom I have for many years felt connected both in friendship and professional life. This is a decision that I would hope to be adopted also by other European Intellectuals and Teachers.