Tensions rise on the Korean peninsula. North and South Korea exchanged artillery fire and harsh rhetoric this week, reflecting rising tensions between the Pyongyang and Seoul. The latest clash began after the North fired into the Demilitarized Zone in an attempt to silence loudspeakers that have recently begun to broadcast anti-North messages. The South responded with its own artillery, placed its military on high alert and warned the North against “rash acts” that would result in more severe punishment from the South. The North, which is also protesting the current annual U.S.-South Korean military exercises, has threatened strikes deeper South if the loudspeakers are not removed by Saturday. There are approximately 28,500 U.S. troops stationed in South Korea.