Courtesy of the AFP.

US President Barack Obama speaks on nuclear security, touching on subjects from terrorism to Iran and North Korea, during a speech at Hankuk University of Foreign Studies in Seoul on March 26, 2012. Obama and dozens of other world leaders will begin the 2012 Seoul Nuclear Security Summit on March 26 curbing the threat of nuclear terrorism, but North Korea’s atomic plans will be in focus on the sidelines. (AFP PHOTO/JEWEL SAMAD)