"The United States and Russia signed the New START Treaty on April 8, 2010. [...] New START provides the parties with 7 years to reduce their forces, and will remain in force for a total of 10 years. [...] New START contains detailed definitions and counting rules that will help the parties calculate the number of warheads that count under the treaty limits. Moreover, the delivery vehicles and their warheads will count under the treaty limits until they are converted or eliminated according to the provisions described in the treaty's Protocol. [...] The monitoring and verification regime in the New START Treaty is less costly and complex than the regime in START. Like START, though, it contains detailed definitions of items limited by the treaty; provisions governing the use of national technical means (NTM) to gather data on each side's forces and activities; an extensive database that identifies the numbers, types, and locations of items limited by the treaty; provisions requiring notifications about items limited by the treaty; and inspections allowing the parties to confirm information shared during data exchanges. New START does not limit current or planned U.S. missile defense programs. [...] The Obama Administration and outside analysts argue that New START strengthens strategic stability and enhances U.S. national security. Critics, however, question whether the treaty serves U.S. national security interests, as Russia was likely to reduce its forces with or without an arms control agreement and because the United States and Russia no longer need arms control treaties to manage their relationship."
CRS Report for Congress, R41219
Federation of American Scientists: http://www.fas.org/sgp/crs/index.html