Confidence-building measures must increase after the CTBT, comprehensive nuclear test ban treaty, enters into force. In this context, Russia intends to call other countries, primarily the USA, to analyse opportunities for enhanced nuclear testing ground safety, which will overstep treaty demands. Such measures might include exchanges of geological information, certain test and experiment results, and increasing the number of gauges, Marshal Igor Sergeyev, President Vladimir Putin's strategic stability adviser and recent Defence Minister, said to a second conference on promoting the CTBT entry into force. Strategic stability depends not only on nuclear disarmament. Mass destruction weapon and vehicle proliferation, and other new challenges largely determine global security. Russia is well aware of that. There is another appalling danger--international terrorism. Suffice it to mention unprecedentedly cruel terror acts in New York City and Washington, D.C. The American tragedy of September 11 showed that the world is facing an unflinching and uncompromising struggle, and nuclear nonproliferation efforts are an essential part of that struggle, said Marshal Sergeyev. An available system of international treaties in that field is sufficient for today, though it requires further improvement, remarked the marshal as he called for the utmost circumspection in the use of force against terrorism. He pointed out the necessity to see the importance of preventive measures. Some of these base on increased efficiency of implementing the acting international treaties, of which the CTBT is prominent.