A South Korean army tank participates in a drill at a military training field in the border city of Paju on March 29, 2013. North Korean leader Kim Jong-Un on March 29, ordered missile units to prepare to strike US mainland and military bases, vowing to “settle accounts” after US stealth bombers flew over South Korea. AFP PHOTO / JUNG YEON-JE (Photo credit should read JUNG YEON-JE/AFP/Getty Images)
