Article Photos: US diplomat: NKorea rocket threatens security 1/4

  South Korea's nuclear envoy Lim Sung-nam, right, shakes hands with Kurt Campbell, U.S. Assistant Secretary of State for East Asia and Pacific Affairs, before their meeting at the Foreign Ministry in Seoul, South Korea, Monday, April 16, 2012. Campbell is in Seoul as part of an Asian tour aimed to discuss North Korea's recent failed rocket launch. (AP Photo/Jung Yeon-je, Pool)