America and South Korea have agreed to expand military exercises to counter the threat from the North, while at the same time offering Pyongyang help to tackle its COVID-19 outbreak.
Speaking on a visit to Seoul, the US President Joe Biden expressed concerns about the North's growing nuclear capabilities and said he would meet its leader Kim Jong Un if "he was serious".
Mr Biden was in the country for his first diplomatic talks with his new South Korean counterpart Yoon Suk Yeol, who was inaugurated 11 days ago.
Dominating the discussions were continuing tensions with North Korea and fears it could launch...
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