<span style="color: #222222;">North Korea conducted another crucial test at its Sohae satellite launch site yesterday. A spokesman for the National Academy of Defence Science of North Korea said the research successes will be applied to further bolstering up the reliable strategic nuclear deterrent of the country.</span><br />'' <br />'' <span style="color: #222222;">Nuclear negotiations between Pyongyang and Washington remain deadlocked with a deadline approaching.</span><br />