North Korea conducts second nuclear test , angering world governments . Comment: North also tested a short-range missile , White House says . U.S. says nuclear test was in `` blatant defiance '' of the Security Council .
North Korea conducts second nuclear test , angering world governments . Emergency meeting of U.N. Security Council called . North also tested a short-range missile , White House says . U.S. says nuclear test was in `` blatant defiance '' of the Security Council .