President Bush and Russian President Vladimir Putin have discussed their concerns about Iran's nuclear program in their meeting on the sidelines of the Asia Pacific Economic Cooperation summit in Busan, South Korea. White House officials say Mr. Bush supported a Russian proposal to have Iran enrich uranium inside Russia, as a way to prevent the diversion of the material to a nuclear weapons program. In other meetings Friday Mr. Bush urged leaders of the Association of Southeast Asian Nations to use their influence to pressure Burma on its human rights record. Mr. Bush also met with the leaders of Canada, Mexico and Peru to review progress on seeking freer and fairer trade, including work towards a free trade agreement of the Americas.