YEONPYEONG ISLAND, SOUTH KOREA - DECEMBER 20: (SOUTH KOREA OUT) South Korean marines check their gas mask at a shelter during a military drill on December 20, 2010 in Yeonpyeong Island, South Korea.... more 
YEONPYEONG ISLAND, SOUTH KOREA - DECEMBER 20: (SOUTH KOREA OUT) South Korean marines check their gas mask at a shelter during a military drill on December 20, 2010 in Yeonpyeong Island, South Korea. South Korea held live-firing drills on the island of Yeonpyeong, which was shelled last month by North Korea. However, North Korea has stated that it will not retaliate to today's drills. (Photo by Korea Pool/Getty Images) less 
1 / 26
Getty Images | Photo By Pool / Getty Images
Mon, Dec 20, 2010 9:04 AM EST