The US and South Korea conducted joint naval exercises in the Sea of Japan to hone their skills in countering maritime security threats and ensuring safe navigation amid North Korean threats, according to Yonhap. The annual exercises began on April 1 and lasted for nine days. It is known that in the waters near the coast of Pohang, 262 kilometres southeast of Seoul, US and South Korean military personnel practised mine countermeasures against North Korea. Nine military ships and four helicopters participated in the exercises. The US dispatched an expeditionary sea base, USS Miguel Keith (ESB 5…