South Korean Marine K-55 self-propelled howitzers are on positions during an exercise against possible attacks by North Korea near the border village of Panmunjom in Paju, South Korea, Wednesday, ... more 
South Korean Marine K-55 self-propelled howitzers are on positions during an exercise against possible attacks by North Korea near the border village of Panmunjom in Paju, South Korea, Wednesday, April 3, 2013. (AP Photo/Ahn Young-joon) less 
1 / 30
Associated Press | Photo By Ahn Young-joon
Tue, Apr 2, 2013 11:51 PM EDT