More than 13,000 American and South Korean military personnel are taking part in the Key Resolve drill.
South Korea and U.S. Hold Military Drill
![South Korean Army soldiers patrol along a barbed-wire fence near the border village of Panmunjom in Paju, South Korea, March 11, 2013.](https://gdb.voanews.com/8CB2FA69-7BC1-4D9E-AF6D-0D837720AB1A_w1024_q10_s.jpg)
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South Korean Army soldiers patrol along a barbed-wire fence near the border village of Panmunjom in Paju, South Korea, March 11, 2013.
![South Korean Army soldiers work on their K-9 self-propelled artillery vehicles during an exercise near the border village of Panmunjom in Paju, South Korea, March 11, 2013.](https://gdb.voanews.com/64ADD1DC-A444-47A8-A18A-FF9851469B4C_w1024_q10_s.jpg)
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South Korean Army soldiers work on their K-9 self-propelled artillery vehicles during an exercise near the border village of Panmunjom in Paju, South Korea, March 11, 2013.
![South Korean Army soldiers patrol along a barbed-wire fence near the border village of Panmunjom in Paju, South Korea, March 11, 2013.](https://gdb.voanews.com/ECFC8215-D5C6-434D-8CA9-5808BE9AFC46_w1024_q10_s.jpg)
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South Korean Army soldiers patrol along a barbed-wire fence near the border village of Panmunjom in Paju, South Korea, March 11, 2013.
![South Korean protesters shout slogans during a rally denouncing the annual joint military exercises between South Korea and the United States, near the U.S. Embassy in Seoul, South Korea, March 11, 2013.](https://gdb.voanews.com/E5CEF54D-8160-4B5D-958D-F82B8088EB1D_w1024_q10_s.jpg)
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South Korean protesters shout slogans during a rally denouncing the annual joint military exercises between South Korea and the United States, near the U.S. Embassy in Seoul, South Korea, March 11, 2013.