A protester holds a sign at a rally demanding to halt the joint military exercise between the United States and South Korea, outside a U.S. naval base in Pyeongtaek, south of Seoul, November 28, 2010. North Korea has placed surface-to-surface missiles on launch pads in the Yellow Sea, Yonhap news agency reported on Sunday, as the United States and South Korea began joint military exercises. The sign reads,'go back nuclear-powered carrier USS George Washington.' REUTERS