A Nuclear Security Summit Regional Seminar was held June 20 in Santiago, Chile, attended by nineteen Latin American countries, as well as the Republic of Korea, Canada and the United States. The seminar served as an opportunity to open up discussion for the countries that were unable to attend the Nuclear Security Summit of April 2010, and to follow-up on issues the Summit discussed. Some of the topics that were covered at the seminar include the 2010 Nuclear Security Summit, transport and security of radioactive materials, and trafficking of nuclear material. The United States presented the progress that countries have made on the commitments defined in the Work Plan of the 2010 Nuclear Security Summit, which constitutes a political commitment by the Participating States to carry out, on a voluntary basis, steps on all aspects of the storage, use, transportation, and disposal of nuclear materials and in preventing non-state actors from obtaining the information required to use such material for malicious purposes. Brazil, Mexico, and Argentina gave presentations to highlight their commitment to the Summit Work Plan. South Korea presented on the next Nuclear Security Summit, which will be held in Korea in April 2012. Ambassador Bonnie Jenkins, the Coordinator for Threat Reduction Programs at the U.S. Department of State, led the U.S. delegation.