Earlier this week, President Barack Obama visited Observation Post Ouellette during a trip to the Joint Security Area of the Demilitarized Zone (DMZ) near Panmunjom on the border between North and South Korea. While at the DMZ, the President stood behind a thick wall of bullet-proof glass and was able to look across the most heavily militarized border in the world. Obama arrived in Seoul earlier in the day to attend the 2012 Seoul Nuclear Security Summit to be held on March 26-27. (JEWEL SAMAD/AFP/Getty Images)
