Thank you for raising that important issue. Of course, a concern to all of us is the growing capacity of Iran to move towards a nuclear weapons capability and the risks that this would pose. There are a range of responses. Unilateral sanctions, for example, have been tried. It seems as though they've failed to stop anything and that Iran is intransigent. It seems they will not respond to unilateral sanctions. That does not mean that one does not continue sanctions, but they cannot be the only response.
One of the other responses, which had considerable success in the 2010 NPT Review Conference, was to look at regional and global approaches to Iran, not just unilateral ones. The proposal to hold a Middle East conference on weapons of mass destruction, including nuclear weapons, found favour from Iran and also enabled Iran to accept other controls, non-proliferation conditions, that they were not previously going to agree to. They stayed and agreed to the entire package of non-proliferation steps in the 2010 NPT Review Conference. They got something that was important for their security, which was that they have regional neighbours that they think should be included in a non-discriminatory approach. So using a range of initiatives and approaches is important.