Trump's stern warning to Kim Jong-un over nuclear testing

Earlier, Kim Jong-un and US President Donald Trump has held face-to-face talks in Singapore in June 2018, and in Vietnam in February 2019 aiming at denuclearisation. In historic first, Donald Trump had become the first sitting US President to step on North Korean soil on June 30, 2019 as he met North Korean leader Kim Jong Un in the Demilitarized Zone (DMZ) that divides the peninsula, in a symbolic diplomatic spectacle and a first for any American president.