Negotiating With Iran - NYTimes.com "Iran Nuclear Talks: Unfinished, but Alive" (editorial, Nov. 12) correctly notes concerns about Iran's heavy water reactor. While this reactor offers a pathway to a nuclear bomb, the path can be blocked if Tehran renounces reprocessing, and if it does not have stocks of spent fuel that can be reprocessed. Thus, talks with Tehran could proceed with an understanding that it would have to accept that it cannot reprocess or have material for reprocessing. The writer is an associate professor of politics at the University of Cincinnati and the author of "Containing Missile Proliferation."