A man crosses a road in front of a Hyundai dealership in downtown Seoul, South Korea, Wednesday, April 24, 2013. (AP Photo/Kin Cheung)
A man crosses a road in front of a Hyundai dealership in downtown Seoul, South Korea, Wednesday, April 24, 2013. (AP Photo/Kin Cheung)
South Korean President Park Geun-hye, left, shakes hands with Microsoft founder Bill Gates before their meeting at the presidential Blue House in Seoul, South Korea, Monday, April 22, 2013. (AP Photo/Lee Jin-man, Pool)
South Korean President Park Geun-hye, left, shakes hands with Microsoft founder Bill Gates before their meeting at the presidential Blue House in Seoul, South Korea, Monday, April 22, 2013. (AP Photo/Lee Jin-man, Pool)
A B-2 stealth bomber refuels. The U.S. Embassy in Seoul tweeted the photo on Thursday, March 28, 2013, with the caption: "Two B-2 bombers flew over South Korea today, demonstrating the US’s ability to conduct precision strikes at will."
A North Korean soldier looks toward South Korea through a pair of binoculars at the border village of Panmunjom in the Demilitarized Zone, which has separated the two Koreas since the Korean War, on Tuesday, April 23, 2013. (AP Photo/Lee Jin-man)
A North Korean soldier looks toward South Korea through a pair of binoculars at the border village of Panmunjom in the Demilitarized Zone, which has separated the two Koreas since the Korean War, on Tuesday, April 23, 2013. (AP Photo/Lee Jin-man)
Koshik, a 22-year-old Asian elephant, puts his trunk in his mouth to modulate sound next to his chief trainer, Kim Jong-gab, at the Everland amusement park in Yongin, South Korea, on Friday, Nov. 2, 2012. Koshik can reproduce five Korean words by tucking his trunk inside his mouth to modulate sound. (AP Photo/Ahn Young-joon)
South Korean Army soldiers patrol on Unification Bridge in Paju, South Korea, near the border village of Panmunjom, on April 16, 2013. North Korea's state media said the Supreme Command of the Korean People's Army issued an ultimatum demanding an apology from South Korea for "hostile acts" and threatening that unspecified retaliatory actions would happen at any time. (Associated Press)
