India has canceled a military delegation visit to China on a ‘confidence building’ tour after Chinese authorities refused to give a visa to one member of the delegation. The rejected officer is a native of Arunachal Pradesh in northeastern India; China claims that most of the territory in question is part of southern Tibet.The ability of disputes like this one to disrupt relations between the two Asian giants is cause for concern. Both countries are likely to become more nationalist and assertive in coming years; governments will not want to antagonize nationalist opinion and risk angry press and internet criticism if they are seen as acting ‘soft’.If the US goal in the region was to isolate and contain China, such incidents might be welcome. But the US prefers the development of a peaceful and integrated Asian system to an angry standoff or a new cold war. Good relations between Japan, India and China are good for the United States; border disputes between nuclear powers are never good news.