US-South Korean Army Conduct River Crossing Exercise(01 of40)
Open Image ModalYEONCHEON-GUN, SOUTH KOREA - MAY 30: South Korean soldiers from 6th Engineer Brigade participate in a river crossing exercise on May 30, 2013 in Yeoncheon-gun, South Korea. The joint exercise is for the first time in 10 years, eyeing possible attacks of North Korea. (Photo by Chung Sung-Jun/Getty Images) (credit:Getty Images)
US-South Korean Army Conduct River Crossing Exercise(02 of40)
Open Image ModalYEONCHEON-GUN, SOUTH KOREA - MAY 30: U.S. Army\'s M1A2 tank and soldiers from 2nd Battalion, 9th Infantry Regiment of the 1st Armored Brigade Combat Team of 2nd infantry division and South Korean soldiers from 6th Engineer Brigade participate in a river crossing exercise on May 30, 2013 in Yeoncheon-gun, South Korea. The joint exercise is for the first time in 10 years, eyeing possible attacks of North Korea. (Photo by Chung Sung-Jun/Getty Images) (credit:Getty Images)
US-South Korean Army Conduct River Crossing Exercise(03 of40)
Open Image ModalYEONCHEON-GUN, SOUTH KOREA - MAY 30: South Korean soldiers from 6th Engineer Brigade participate in a river crossing exercise on May 30, 2013 in Yeoncheon-gun, South Korea. The joint exercise is for the first time in 10 years, eyeing possible attacks of North Korea. (Photo by Chung Sung-Jun/Getty Images) (credit:Getty Images)
US-South Korean Army Conduct River Crossing Exercise(04 of40)
Open Image ModalYEONCHEON-GUN, SOUTH KOREA - MAY 30: South Korean soldiers from 6th Engineer Brigade participate in a river crossing exercise on May 30, 2013 in Yeoncheon-gun, South Korea. The joint exercise is for the first time in 10 years, eyeing possible attacks of North Korea. (Photo by Chung Sung-Jun/Getty Images) (credit:Getty Images)
US-South Korean Army Conduct River Crossing Exercise(05 of40)
Open Image ModalYEONCHEON-GUN, SOUTH KOREA - MAY 30: South Korean soldiers from 6th Engineer Brigade participate in a river crossing exercise on May 30, 2013 in Yeoncheon-gun, South Korea. The joint exercise is for the first time in 10 years, eyeing possible attacks of North Korea. (Photo by Chung Sung-Jun/Getty Images) (credit:Getty Images)
US-South Korean Army Conduct River Crossing Exercise(06 of40)
Open Image ModalYEONCHEON-GUN, SOUTH KOREA - MAY 30: US soldiers from 2nd Battalion, 9th Infantry Regiment of the 1st Armored Brigade Combat Team of 2nd infantry division and South Korean soldiers from 6th Engineer Brigade participate in a river crossing exercise on May 30, 2013 in Yeoncheon-gun, South Korea. The joint exercise is for the first time in 10 years, eyeing possible attacks of North Korea. (Photo by Chung Sung-Jun/Getty Images) (credit:Getty Images)
US-South Korean Army Conduct River Crossing Exercise(07 of40)
Open Image ModalYEONCHEON-GUN, SOUTH KOREA - MAY 30: A South Korean soldier from 6th Engineer Brigade participates in a river crossing exercise on May 30, 2013 in Yeoncheon-gun, South Korea. The joint exercise is for the first time in 10 years, eyeing possible attacks of North Korea. (Photo by Chung Sung-Jun/Getty Images) (credit:Getty Images)
US-South Korean Army Conduct River Crossing Exercise(08 of40)
Open Image ModalYEONCHEON-GUN, SOUTH KOREA - MAY 30: South Korean soldiers from 6th Engineer Brigade participate in a river crossing exercise on May 30, 2013 in Yeoncheon-gun, South Korea. The joint exercise is for the first time in 10 years, eyeing possible attacks of North Korea. (Photo by Chung Sung-Jun/Getty Images) (credit:Getty Images)
US-South Korean Army Conduct River Crossing Exercise(09 of40)
Open Image ModalYEONCHEON-GUN, SOUTH KOREA - MAY 30: US soldiers from 2nd Battalion, 9th Infantry Regiment of the 1st Armored Brigade Combat Team of 2nd infantry division and South Korean soldiers from 6th Engineer Brigade participate in a river crossing exercise on May 30, 2013 in Yeoncheon-gun, South Korea. The joint exercise is for the first time in 10 years, eyeing possible attacks of North Korea. (Photo by Chung Sung-Jun/Getty Images) (credit:Getty Images)
US-South Korean Army Conduct River Crossing Exercise(10 of40)
Open Image ModalYEONCHEON-GUN, SOUTH KOREA - MAY 30: South Korean soldiers from 6th Engineer Brigade participate in a river crossing exercise on May 30, 2013 in Yeoncheon-gun, South Korea. The joint exercise is for the first time in 10 years, eyeing possible attacks of North Korea. (Photo by Chung Sung-Jun/Getty Images) (credit:Getty Images)
US-South Korean Army Conduct River Crossing Exercise(11 of40)
Open Image ModalYEONCHEON-GUN, SOUTH KOREA - MAY 30: South Korean soldiers from 6th Engineer Brigade participate in a river crossing exercise on May 30, 2013 in Yeoncheon-gun, South Korea. The joint exercise is for the first time in 10 years, eyeing possible attacks of North Korea. (Photo by Chung Sung-Jun/Getty Images) (credit:Getty Images)
US-South Korean Army Conduct River Crossing Exercise(12 of40)
Open Image ModalYEONCHEON-GUN, SOUTH KOREA - MAY 30: U.S. Army\'s M1A2 tank and soldiers from 2nd Battalion, 9th Infantry Regiment of the 1st Armored Brigade Combat Team of 2nd infantry division participate in a river crossing exercise on May 30, 2013 in Yeoncheon-gun, South Korea. The joint exercise is for the first time in 10 years, eyeing possible attacks of North Korea. (Photo by Chung Sung-Jun/Getty Images) (credit:Getty Images)
US-South Korean Army Conduct River Crossing Exercise(13 of40)
Open Image ModalYEONCHEON-GUN, SOUTH KOREA - MAY 30: U.S. Army\'s M1A2 tank and soldiers from 2nd Battalion, 9th Infantry Regiment of the 1st Armored Brigade Combat Team of 2nd infantry division and South Korean soldiers from 6th Engineer Brigade participate in a river crossing exercise on May 30, 2013 in Yeoncheon-gun, South Korea. The joint exercise is for the first time in 10 years, eyeing possible attacks of North Korea. (Photo by Chung Sung-Jun/Getty Images) (credit:Getty Images)
US-South Korean Army Conduct River Crossing Exercise(14 of40)
Open Image ModalYEONCHEON-GUN, SOUTH KOREA - MAY 30: South Korean soldiers from 6th Engineer Brigade participate in a river crossing exercise on May 30, 2013 in Yeoncheon-gun, South Korea. The joint exercise is for the first time in 10 years, eyeing possible attacks of North Korea. (Photo by Chung Sung-Jun/Getty Images) (credit:Getty Images)
US-South Korean Army Conduct River Crossing Exercise(15 of40)
Open Image ModalYEONCHEON-GUN, SOUTH KOREA - MAY 30: South Korean soldiers from 6th Engineer Brigade participate in a river crossing exercise on May 30, 2013 in Yeoncheon-gun, South Korea. The joint exercise is for the first time in 10 years, eyeing possible attacks of North Korea. (Photo by Chung Sung-Jun/Getty Images) (credit:Getty Images)
US-South Korean Army Conduct River Crossing Exercise(16 of40)
Open Image ModalYEONCHEON-GUN, SOUTH KOREA - MAY 30: South Korean soldiers from 6th Engineer Brigade participate in a river crossing exercise on May 30, 2013 in Yeoncheon-gun, South Korea. The joint exercise is for the first time in 10 years, eyeing possible attacks of North Korea. (Photo by Chung Sung-Jun/Getty Images) (credit:Getty Images)
US-South Korean Army Conduct River Crossing Exercise(17 of40)
Open Image ModalYEONCHEON-GUN, SOUTH KOREA - MAY 30: US soldiers from 2nd Battalion, 9th Infantry Regiment of the 1st Armored Brigade Combat Team of 2nd infantry division participate in a river crossing exercise on May 30, 2013 in Yeoncheon-gun, South Korea. The joint exercise is for the first time in 10 years, eyeing possible attacks of North Korea. (Photo by Chung Sung-Jun/Getty Images) (credit:Getty Images)
US-South Korean Army Conduct River Crossing Exercise(18 of40)
Open Image ModalYEONCHEON-GUN, SOUTH KOREA - MAY 30: A South Korean soldier from 6th Engineer Brigade participates in a river crossing exercise on May 30, 2013 in Yeoncheon-gun, South Korea. The joint exercise is for the first time in 10 years, eyeing possible attacks of North Korea. (Photo by Chung Sung-Jun/Getty Images) (credit:Getty Images)
US-South Korean Army Conduct River Crossing Exercise(19 of40)
Open Image ModalYEONCHEON-GUN, SOUTH KOREA - MAY 30: U.S. Army\'s M1A2 tank and soldiers from 2nd Battalion, 9th Infantry Regiment of the 1st Armored Brigade Combat Team of 2nd infantry division and South Korean soldiers from 6th Engineer Brigade participate in a river crossing exercise on May 30, 2013 in Yeoncheon-gun, South Korea. The joint exercise is for the first time in 10 years, eyeing possible attacks of North Korea. (Photo by Chung Sung-Jun/Getty Images) (credit:Getty Images)
US-South Korean Army Conduct River Crossing Exercise(20 of40)
Open Image ModalYEONCHEON-GUN, SOUTH KOREA - MAY 30: South Korean soldiers from 6th Engineer Brigade participate in a river crossing exercise on May 30, 2013 in Yeoncheon-gun, South Korea. The joint exercise is for the first time in 10 years, eyeing possible attacks of North Korea. (Photo by Chung Sung-Jun/Getty Images) (credit:Getty Images)
SKOREA-US-MILITARY-DRILL(21 of40)
Open Image ModalSouth Korean soldiers stand in front of military trucks containing floating bridge duirng a US-South Korea joint river crossing exercise in the border city of Yeoncheon, northeast of Seoul, on May 30, 2013. This training is aimed to enhance the two allies\' combined coombat capabilities, US military authorities said. AFP PHOTO / JUNG YEON-JE (Photo credit should read JUNG YEON-JE/AFP/Getty Images) (credit:Getty Images)
US-South Korean Army Conduct River Crossing Exercise(22 of40)
Open Image ModalYEONCHEON-GUN, SOUTH KOREA - MAY 30: South Korean soldiers from 6th Engineer Brigade participate in a river crossing exercise on May 30, 2013 in Yeoncheon-gun, South Korea. The joint exercise is for the first time in 10 years, eyeing possible attacks of North Korea. (Photo by Chung Sung-Jun/Getty Images) (credit:Getty Images)
SKOREA-US-MILITARY-DRILL(23 of40)
Open Image ModalUS soldiers from 2nd Infantry Division hang a South Korean flag on the top of their M1A2 tank duirng a US-South Korea joint river crossing exercise in the border city of Yeoncheon, northeast of Seoul, on May 30, 2013. This training is aimed to enhance the two allies\' combined coombat capabilities, US military authorities said. AFP PHOTO / JUNG YEON-JE (Photo credit should read JUNG YEON-JE/AFP/Getty Images) (credit:Getty Images)
US-South Korean Army Conduct River Crossing Exercise(24 of40)
Open Image ModalYEONCHEON-GUN, SOUTH KOREA - MAY 30: U.S. Army\'s M1A2 tank and soldiers from 2nd Battalion, 9th Infantry Regiment of the 1st Armored Brigade Combat Team of 2nd infantry division participate in a river crossing exercise on May 30, 2013 in Yeoncheon-gun, South Korea. The joint exercise is for the first time in 10 years, eyeing possible attacks of North Korea. (Photo by Chung Sung-Jun/Getty Images) (credit:Getty Images)
US-South Korean Army Conduct River Crossing Exercise(25 of40)
Open Image ModalYEONCHEON-GUN, SOUTH KOREA - MAY 30: South Korean soldiers from 6th Engineer Brigade participate in a river crossing exercise on May 30, 2013 in Yeoncheon-gun, South Korea. The joint exercise is for the first time in 10 years, eyeing possible attacks of North Korea. (Photo by Chung Sung-Jun/Getty Images) (credit:Getty Images)
SKOREA-US-MILITARY-DRILL(26 of40)
Open Image ModalUS soldiers from 2nd Infantry Division talk with South Korean soldiers duirng a US-South Korea joint river crossing exercise in the border city of Yeoncheon, northeast of Seoul, on May 30, 2013. This training is aimed to enhance the two allies\' combined coombat capabilities, US military authorities said. AFP PHOTO / JUNG YEON-JE (Photo credit should read JUNG YEON-JE/AFP/Getty Images) (credit:Getty Images)
SKOREA-US-MILITARY-DRILL(27 of40)
Open Image ModalUS soldiers from 2nd Infantry Division stand on the top of their M1A2 tank duirng a US-South Korea joint river crossing exercise in the border city of Yeoncheon, northeast of Seoul, on May 30, 2013. This training is aimed to enhance the two allies\' combined coombat capabilities, US military authorities said. AFP PHOTO / JUNG YEON-JE (Photo credit should read JUNG YEON-JE/AFP/Getty Images) (credit:Getty Images)
US-South Korean Army Conduct River Crossing Exercise(28 of40)
Open Image ModalYEONCHEON-GUN, SOUTH KOREA - MAY 30: U.S. Army\'s M1A2 tank and soldiers from 2nd Battalion, 9th Infantry Regiment of the 1st Armored Brigade Combat Team of 2nd infantry division and South Korean soldiers from 6th Engineer Brigade participate in a river crossing exercise on May 30, 2013 in Yeoncheon-gun, South Korea. The joint exercise is for the first time in 10 years, eyeing possible attacks of North Korea. (Photo by Chung Sung-Jun/Getty Images) (credit:Getty Images)
SKOREA-US-MILITARY-DRILL(29 of40)
Open Image ModalUS soldiers from 2nd Infantry Division stand on the top of their M1A2 tank duirng a US-South Korea joint river crossing exercise in the border city of Yeoncheon, northeast of Seoul, on May 30, 2013. This training is aimed to enhance the two allies\' combined coombat capabilities, US military authorities said. AFP PHOTO / JUNG YEON-JE (Photo credit should read JUNG YEON-JE/AFP/Getty Images) (credit:Getty Images)
SKOREA-US-MILITARY-DRILL(30 of40)
Open Image ModalSouth Korean soldiers set up a floating bridge duirng a US-South Korea joint river crossing exercise in the border city of Yeoncheon, northeast of Seoul, on May 30, 2013. This training is aimed to enhance the two allies\' combined coombat capabilities, US military authorities said. AFP PHOTO / JUNG YEON-JE (Photo credit should read JUNG YEON-JE/AFP/Getty Images) (credit:Getty Images)
US-South Korean Army Conduct River Crossing Exercise(31 of40)
Open Image ModalYEONCHEON-GUN, SOUTH KOREA - MAY 30: South Korean soldiers from 6th Engineer Brigade participate in a river crossing exercise on May 30, 2013 in Yeoncheon-gun, South Korea. The joint exercise is for the first time in 10 years, eyeing possible attacks of North Korea. (Photo by Chung Sung-Jun/Getty Images) (credit:Getty Images)
US-South Korean Army Conduct River Crossing Exercise(32 of40)
Open Image ModalYEONCHEON-GUN, SOUTH KOREA - MAY 30: U.S. Army\'s M1A2 tank and soldiers from 2nd Battalion, 9th Infantry Regiment of the 1st Armored Brigade Combat Team of 2nd infantry division and South Korean soldiers from 6th Engineer Brigade participate in a river crossing exercise on May 30, 2013 in Yeoncheon-gun, South Korea. The joint exercise is for the first time in 10 years, eyeing possible attacks of North Korea. (Photo by Chung Sung-Jun/Getty Images) (credit:Getty Images)
US-South Korean Army Conduct River Crossing Exercise(33 of40)
Open Image ModalYEONCHEON-GUN, SOUTH KOREA - MAY 30: U.S. Army\'s M1A2 tank and soldiers from 2nd Battalion, 9th Infantry Regiment of the 1st Armored Brigade Combat Team of 2nd infantry division and South Korean soldiers from 6th Engineer Brigade participate in a river crossing exercise on May 30, 2013 in Yeoncheon-gun, South Korea. The joint exercise is for the first time in 10 years, eyeing possible attacks of North Korea. (Photo by Chung Sung-Jun/Getty Images) (credit:Getty Images)
US-South Korean Army Conduct River Crossing Exercise(34 of40)
Open Image ModalYEONCHEON-GUN, SOUTH KOREA - MAY 30: U.S. Army\'s M1A2 tank and soldiers from 2nd Battalion, 9th Infantry Regiment of the 1st Armored Brigade Combat Team of 2nd infantry division participate in a river crossing exercise on May 30, 2013 in Yeoncheon-gun, South Korea. The joint exercise is for the first time in 10 years, eyeing possible attacks of North Korea. (Photo by Chung Sung-Jun/Getty Images) (credit:Getty Images)
US-South Korean Army Conduct River Crossing Exercise(35 of40)
Open Image ModalYEONCHEON-GUN, SOUTH KOREA - MAY 30: U.S. Army\'s M1A2 tank and soldiers from 2nd Battalion, 9th Infantry Regiment of the 1st Armored Brigade Combat Team of 2nd infantry division participate in a river crossing exercise on May 30, 2013 in Yeoncheon-gun, South Korea. The joint exercise is for the first time in 10 years, eyeing possible attacks of North Korea. (Photo by Chung Sung-Jun/Getty Images) (credit:Getty Images)
US-South Korean Army Conduct River Crossing Exercise(36 of40)
Open Image ModalYEONCHEON-GUN, SOUTH KOREA - MAY 30: A South Korean soldier from 6th Engineer Brigade participates in a river crossing exercise on May 30, 2013 in Yeoncheon-gun, South Korea. The joint exercise is for the first time in 10 years, eyeing possible attacks of North Korea. (Photo by Chung Sung-Jun/Getty Images) (credit:Getty Images)
US-South Korean Army Conduct River Crossing Exercise(37 of40)
Open Image ModalYEONCHEON-GUN, SOUTH KOREA - MAY 30: South Korean soldiers from 6th Engineer Brigade participate in a river crossing exercise on May 30, 2013 in Yeoncheon-gun, South Korea. The joint exercise is for the first time in 10 years, eyeing possible attacks of North Korea. (Photo by Chung Sung-Jun/Getty Images) (credit:Getty Images)
US-South Korean Army Conduct River Crossing Exercise(38 of40)
Open Image ModalYEONCHEON-GUN, SOUTH KOREA - MAY 30: South Korean soldiers from 6th Engineer Brigade participate in a river crossing exercise on May 30, 2013 in Yeoncheon-gun, South Korea. The joint exercise is for the first time in 10 years, eyeing possible attacks of North Korea. (Photo by Chung Sung-Jun/Getty Images) (credit:Getty Images)
US-South Korean Army Conduct River Crossing Exercise(39 of40)
Open Image ModalYEONCHEON-GUN, SOUTH KOREA - MAY 30: U.S. Army\'s M1A2 tank and soldiers from 2nd Battalion, 9th Infantry Regiment of the 1st Armored Brigade Combat Team of 2nd infantry division and South Korean soldiers from 6th Engineer Brigade participate in a river crossing exercise on May 30, 2013 in Yeoncheon-gun, South Korea. The joint exercise is for the first time in 10 years, eyeing possible attacks of North Korea. (Photo by Chung Sung-Jun/Getty Images) (credit:Getty Images)
US-South Korean Army Conduct River Crossing Exercise(40 of40)
Open Image ModalYEONCHEON-GUN, SOUTH KOREA - MAY 30: A South Korean soldier from 6th Engineer Brigade participates in a river crossing exercise on May 30, 2013 in Yeoncheon-gun, South Korea. The joint exercise is for the first time in 10 years, eyeing possible attacks of North Korea. (Photo by Chung Sung-Jun/Getty Images) (credit:Getty Images)