Seoul beefs up security ahead of nuclear summit Police patrol outside CEOX in Seoul, South Korea, on March 25, 2012. The Seoul Nuclear Sec...

Seoul beefs up security ahead of nuclear summit

Police patrol outside CEOX in Seoul, South Korea, on March 25, 2012. The Seoul Nuclear Security Summit ( NSS) is scheduled to open here on Monday in an effort to beef up international cooperation in quelling the threat of nuclear terrorism. (Xinhua/Pang Xinglei)

Police patrol outside CEOX in Seoul, South Korea, on March 25, 2012. The Seoul Nuclear Security Summit ( NSS) is scheduled to open here on Monday in an effort to beef up international cooperation in quelling the threat of nuclear terrorism. (Xinhua/Pang Xinglei)

Police patrol outside CEOX in Seoul, South Korea, on March 25, 2012.

The Seoul Nuclear Security Summit ( NSS) is scheduled to open here on Monday in an effort to beef up international cooperation in quelling the threat of nuclear terrorism.