I think the U.S. sanctions are having an impact. They're mostly having an impact in boardrooms in Europe and around the world, and causing a much greater caution with respect to Iran from the international financial community. That has had a significant impact, but it's an insufficient impact to realize the objectives we have of convincing the Iranian regime to put at least some halt to its movement towards nuclear weapons capability, towards its uranium enrichment program.
I think these measures serve as a good template for others to join in. If others do join in, that might bring us up to the threshold necessary to convince the Iranian regime that it has to comply with international norms.