Nuclear Arms Control

New START, a treaty that limits U.S. and Russian nuclear forces, will expire in 2026. The U.S. has identified goals for a successor treaty that include addressing all types of nuclear weapons. The measures for verifying compliance with a New START successor are likely to be similar to those employed for New START, including exchanges of data about deployed strategic delivery vehicles, inspections at relevant bases, and use of satellites. Future treaties could include more extensive nuclear weapons limits. Verifying such treaties may require more advanced technologies--such as devices to measure weapons' radiation signatures--which the U.S. is researching and developing.