N. Korea still building at nuclear site: monitor

North Korea is carrying out rapid improvements to its nuclear research facility, a monitor said on Wednesday, despite declaring a commitment to denuclearisation of the peninsula at the Singapore summit.The nuclear-armed North's leader Kim Jong Un promised to "work toward" the goal at a landmark summit in the city-state earlier this month with US President Donald Trump.Trump claimed the process would start quickly, saying last week that "it will be a total denuclearisation, which is already takin