Iran's nuclear weapons ambitions and its continued obfuscation at the negotiating table have raised alarms throughout the Middle East and the international community. The risk of a nuclear arms race in the region is not hypothetical. We are seeing the repercussions of permitting Iran to retain an enrichment program resonate in the region, and in our 1-2-3 negotiations with other countries who are asking why they need to accept a no-enrichment standard when Iran will be allowed to enrich. For me, the time has come to ask whether repeated negotiation extensions, coupled with sanctions relief in the billions of dollars, will ever result in a comprehensive deal. Iran benefits from successive rounds of unfreezing of assets abroad and has not felt the need to make any real concessions beyond the requirements of the interim agreement. Tehran's desire for a nuclear program has not changed, and it is unlikely to change in my view under the present set of circumstances. Iran is negotiating because it wants economic relief, and it is betting that more time on the clock benefits its position.