US President Donald Trump issued a fresh warning to North Korea today, as speculation mounted that Pyongyang may be preparing another nuclear or missile test.<br/>'<br/>"North Korea is a problem, the problem will be taken care of," Trump said defiantly, amid reports of activity at a North Korean nuclear test site ahead of Saturday's 105th anniversary of the birth of the country's founder Kim Il-Sung.<br/>'<br/>Trump has repeatedly said he will prevent Pyongyang from developing a nuclear-tipped missile capable of reaching the United States. <br/><br/>The US recently deployed a naval strike group to the region as a show of strength.<br/>'<br/>Earlier today, the US military dropped the largest non-nuclear bomb ever deployed in combat at targets in Afghanistan,<br/><br/>Trump played down suggestions that it was also intended as a warning to Pyongyang.<br/>'''''