Analysts say N Korea will likely leverage enlarged nuclear arsenal for US concessions like sanctions relief after a new US administration is inaugurated
North Korea has been pushing to introduce variety of sophisticated weapons systems designed to attack South Korea, mainland US to deal with intensifying security threats
Warning comes after Kim Yo-jong, the influential sister of North Korean leader Kim Jong-un, claims "dirty leaflets and things" discovered in border region
Article 4 of the agreement states that if one of the countries gets invaded and is pushed into a state of war, the other must deploy “all means at its disposal without delay” to provide “military assistance”
Putin's visit to North Korea marks a rare overseas trip since launching the invasion of Ukraine in 2022, and a significant moment for Kim, who hasn't hosted another world leader in his politically isolated country since the COVID-19 pandemic began