The United States and South Korea Air Forces conducted a joint drill today at Gunsan Air Base, amid mounting tensions on the Korean Peninsula.

About 1,500 U.S. And South Korean Pilots participated in the annual Max Thunder Exercise, and 80 aircraft including F-16s and F-15ks were mobilized from both sides, in a bid to boost cooperation in combat situations.

Tension has escalated sharply on the Korean Peninsula amid concerns that reclusive North Korea may soon conduct a sixth Nuclear test.

Poverty-stricken, reclusive North Korea and the rich, democratic south are technically still at war because their 1950-53 conflict ended in a truce, not a peace treaty. About 28,500 U.S. Troops are stationed in South Korea in Joint Defence with the south’s forces against North Korea.