North Korea suspected to have conducted fifth and largest nuclear test

By Ju-min Park, Jack Kim and James Pearson SEOUL (Reuters) - North Korea was likely to have conducted its fifth and largest nuclear test on Friday, South Korean officials and analysts said after meteorological agencies reported a surface-level seismic tremor near the North's known test site. The U.S. Geological Survey and European agencies measured the tremor at a magnitude of 5.3. A South Korea government official and the meteorological agency said it was a suspected nuclear test, and Seoul cal