Christmas tree at centre of Korea dispute * From: AFP * December 21, 2010 7:04PM SOUTH Korean marines are guarding a Christmas tree, the latest focus of tensions with North Korea following Seoul's artillery drill near the disputed sea border a day earlier. A South Korean church was planning to switch on Christmas lights in the shape of a tree atop a military-controlled hill near the tense land border today - the first such display for seven years. The ceremony will come a day after South Korea staged a live-fire exercise on the border island of Yeonpyeong, which was bombarded...