Images from the Korean Peninsula

South Korean vehicles returning from North Korea's Kaesong arrive at the customs, immigration and quarantine office near the border village of Panmunjom, in Paju, South Korea, April 30, 2013.

A South Korean vehicle loaded with goods from North Korea's Kaesong arrives at the customs, immigration and quarantine office near the border village of Panmunjom, in Paju, South Korea, April 30, 2013.

A TV reporter prepares for a news report in front of an empty gate at the customs, immigration and quarantine (CIQ) office in Paju, South Korea, April 29, 2013.

An open gate at a military checkpoint of the inter-Korean transit office in the border city of Paju on April 29, 2013.

Media wait for South Koreans returning home from North Korea's Kaesong at the customs office near the border village of Panmunjom that separates the two Koreas, in Paju, South Korea, April 29, 2013.

South Korean vehicles loaded with goods arrive from North Korea's Kaesong industrial complex at the customs, immigration and quarantine office near Paju, South Korea, April 27, 2013.

A South Korean army soldier talks with a tourist bus driver at Unification bridge, which leads to the demilitarized zone near the border village of Panmunjom in Paju, South Korea, April 26, 2013.

Amphibious assault vehicles of the South Korean Marine Corps throw smoke bombs during a U.S.-South Korea joint landing operation drill in Pohang, South Korea, April 26, 2013. 

South Korean Marine LVT-7 landing craft land during the U.S.-South Korea joint military exercises in Pohang, south of Seoul, April 26, 2013.

North Korean soldiers and civilians pose for souvenir photos in front of a fountain as they tour the grounds of Kumsusan Palace of the Sun, Pyongyang, April 25, 2013.

North Korean soldiers and civilians pose for souvenir photos in front of a fountain as they tour the grounds of Kumsusan Palace of the Sun, Pyongyang, April 25, 2013.