La II Cumbre sobre Seguridad Nuclear, celebrada en Seúl, ha reunido a las potencias mundiales
U.S. President Barack Obama (centre L) shakes hands with Russia's President Dmitry Medvedev (centre R), as South Korea's President Lee Myung-bak (seated) looks on, at a plenary session during the Nuclear Security Summit at the Convention and Exhibition Center (COEX) in Seoul March 27, 2012. REUTERS/Jin Sung-Chul/Yonhap (SOUTH KOREA - Tags: POLITICS MILITARY) NO SALES. NO ARCHIVES. FOR EDITORIAL USE ONLY. NOT FOR SALE FOR MARKETING OR ADVERTISING CAMPAIGNS. THIS IMAGE HAS BEEN SUPPLIED BY A THIRD PARTY. IT IS DISTRIBUTED, EXACTLY AS RECEIVED BY REUTERS, AS A SERVICE TO CLIENTS. SOUTH KOREA OUT. NO COMMERCIAL OR EDITORIAL SALES IN SOUTH KOREA.
(L-R) US President Barack Obama, Kazakhstan's President Nursultan Nazarbayev and Russian President Dmitry Medvedev walk after their tri-laterial meeting on the sidelines of the 2012 Seoul Nuclear Security Summit at the COEX Center in Seoul on March 27, 2012. World leaders have begun the two-day summit in South Korea aimed at curbing the threat of nuclear terrorism, organisers said. AFP PHOTO / RIA-NOVOSTI / KREMLIN POOL / MIKHAIL KLIMENTYEV
South Korea's President Lee Myung-Bak (C) speaks as China's President Hu Jintao (L) and Canada's Prime Minister Stephen Harper (R) listen at the start of a second plenary session of the 2012 Nuclear Security Summit at the COEX Center in Seoul on March 27, 2012. US President Barack Obama told fellow leaders they have the world's safety in their hands, as the 53-nation summit on combating nuclear terrorism held its first full session. AFP PHOTO / JEWEL SAMAD