Yoon Suk-yeol has been sworn in as South Korea’s President.

In the swearing-in ceremony which took place on Tuesday, Yoon described Pyongyang’s missiles as a threat to regional and global security, and called on the North to give up its nuclear weapons in exchange for massive economic aid.

Yoon, 61, who started work in an underground bunker with a security briefing on North Korea, is assuming office at a time of high tensions on the peninsula, with Pyongyang conducting a record 15 weapons tests since January, including two launches last week.