US President Donald Trump has been forced to drop a surprise visit to the demilitarized zone (DMZ) between North and South Korea due to bad weather. <br/><br/>Mr Trump's helicopter took off from US Army Garrison Yongsan in Seoul – but then turned back. US officials said the US leader, who is on a two-day visit to South Korea, is due to address South Korea's parliament shortly.<br/><br/>Yesterday, he urged Pyongyang to come to the table and discuss giving up its nuclear programme. The president has previously threatened "fire and fury" against Pyongyang, prompting a strong reaction from North Korea.<br/><br/>Mr Trump is on a five-nation tour of Asia, and discussing North Korea's nuclear ambitions has been high on his agenda.