he possible sharing of early warning data to enhance command and control and to increase stability in peacetime as well as during potential crises. The United States and Russia began preliminary high-level discussions on the possibility of cooperating on early warning in the summer of 1992, in the context of U.S. and Russian proposals for establishing global protection against ballistic missiles. At that time, it was becoming clear that Russia would experience a loss of radar coverage from sites that, following the break-up of the Soviet Union, would be located outside its territory. Consequently, among other things, the discussions explored ways that could fill gaps in the Russian early warning system. It was anticipated that such cooperation would be particularly useful on the southern periphery to provide better early warning against states that were acquiring weapons of mass destruction and ballistic missiles as a means of delivery. These promising discussions were discontinued. The United States and Russia should resume high-level discussions on early warning. The prospects for mutual benefits from such cooperation remain valid today. A combination of several approaches could be pursued. One approach may be for the United States to provide Russia with selected technology that facilitates the indigenous rebuilding of its early warning systems. Another approach might be to share early warning data in a transparent framework. In addition to the obvious benefit for Russia, there is likely to be substantial value for the United States to have access to Russian information, because it might provide tracking or confirmation of launch locations from another azimuth, as well as useful data about missile launches from Asia. A third approach might be to establish a direct link between command centers to allow for resolution of ambiguous indications. Total number of terrorist attacks is down from a decade ago, but the percentage of people kill...