Should the United States ratify its involvement in the Comprehensive Nuclear-Test-Ban Treaty (CTBT) and take a step toward ending nuclear weapons testing for good? There are certainly risks involved. If you stop testing, how do you know your weapons will work when they need to? And how do you know that others aren’t cheating and developing new weapons that could threaten the U.S.? That’s where science comes in. New technologies allow countries to test their nuclear weapons without detonating them. And the CTBT Organization has built up a vast array of sensors around the globe to detect secret nuclear tests. But are these efforts enough to quell doubts about the treaty?
Join us for a live chat to answer these and other questions at 3 p.m. EDT on Thursday, 5 April, on this page. You can leave your questions in the comment box below before the chat starts.
- No Technical Reason to Avoid a Test Ban, NRC Panel Says 
- Test Ban Monitoring: No Place to Hide  (Science log-in required)
- North Korea's Curious Nuclear Test 
David Hafemeister was the lead technical staff on TTBT for the State Department in 1988 and on CTBT for the National Academy of Sciences in 2000-02.
Raymond Jeanloz is a Professor in the Departments of Earth and Planetary Science and of Astronomy, and a Senior Fellow in the Miller Institute for Basic Research in Science at the University of California, Berkeley.