South Korea summoned the Russian ambassador on Friday to protest Moscow’s new defense pact with North Korea amid rising border tensions. North Korea’s leader, Kim Jong Un, issued vague threats of retaliation after South Korean activists flew anti-Pyongyang leaflets across the border, prompting South Korea’s military to fire warning shots at North Korean soldiers who briefly crossed the border. The defense pact between Moscow and Pyongyang, agreed upon two days earlier, promises mutual assistance if either is attacked. In response, South Korea has hinted at providing arms to Ukraine. KRLD's John Liddle talked with Margaret Brennan from CBS' Face the Nation about the tensions.

Photo: People watch a television broadcast reporting a meeting between North Korean leader Kim Jong Un and Russian President Vladimir Putin at the Seoul railway station on June 19, 2024 in Seoul, South Korea. Russian President Vladimir Putin and North Korean leader Kim Jong-un began summit talks in Pyongyang, Russian news media reported, amid concerns about deepening military cooperation. (Photo by Chung Sung-Jun/Getty Images)