The most obvious attempt was when we gave them an offer that said we are going to provide the conversion of some of the low-enriched uranium that they already have into the isotopes that they need for their medical research and for hospitals that would serve up to a million Iranian citizens. They rejected it -- although one of the difficulties in dealing with Iran over the last several months is it's not always clear who's speaking on behalf of the government, and we get a lot of different, mixed signals. But what's clear is, is that they have not said yes to an agreement that Russia, China, Germany, France, Great Britain and the United States all said was a good deal, and that the director of the IAEA said was the right thing to do and that Iran should accept.