The recent artillery clash on the border of two Koreas threatened the peace loving people across the world. News was published that North Korea first fired dozens of artillery shells at a South Korean island, and then South Korean troops fired back. Pyongyang, however, said South Korea was the first to fire, which killed two marines and injured 18 others. The United States vowed to defend its ally South Korea after North Korea rained artillery shells. Whoever fired first, that doesn't matter. We are afraid that it is the term for balance of power in Asia!