North Korea Fires Missiles After Harris Visits DMZ, South Korea

The video covers a 4-day trip to Asia, focusing on a visit to the Demilitarized Zone (DMZ) in South Korea. The DMZ has been a buffer zone between North and South Korea since 1953 and is a symbolic site for US leaders to demonstrate their stance against North Korea. During a visit by the US vice president, North Korean leader Kim Jong Un launched two ballistic missiles, showcasing his defiance against Western powers.

What was the duration of the trip mentioned in the text?

In what year did the buffer zone between North and South Korea come into existence?