La II Cumbre sobre Seguridad Nuclear, celebrada en Seúl, ha reunido a las potencias mundiales
US PresidenFoto de familia de los líderes que han asistido a la II Cumbre de Seguridad Nuclear, celebrada en Corea del Surt Barack Obama (2nd L) and South Korea's President Lee Myung-Bak (C) gesture after world leaders posed for the group "family photo" at the 2012 Nuclear Security Summit at the COEX Center in Seoul on March 27, 2012. World leaders including US President Barack Obama have begun the two-day summit in South Korea aimed at curbing the threat of nuclear terrorism, organisers said. AFP PHOTO / JEWEL SAMAD
Leaders of nations and international organisations attending the Nuclear Security Summit pose during a group photo taking session at the Convention and Exhibition Center (COEX) in Seoul March 27, 2012. REUTERS/Larry Downing (SOUTH KOREA - Tags: POLITICS MILITARY)
US President Barack Obama (L) shakes hands with Russia's President Dmitry Medvedev (R) at the start of the first plenary session of the 2012 Nuclear Security Summit at the COEX Center in Seoul on March 27, 2012. Obama told yesterday Medvedev that he had little flexibility to address Russia's objections to a US missile defence shield before his November reelection bid. AFP PHOTO / RIA-NOVOSTI / KREMLIN POOL / MIKHAIL KLIMENTYEV