North Korean defectors wearing masks to cover their faces participate Feb. 21, 2012, in a rally against the Chinese government's arrest of North Korean refugees, near the Chinese Embassy in Seoul. The protesters called for China not to send North Korean refugees back to their country, saying those refugees might be executed. (Associated Press)

Photo by: Lee Jin-man

North Korean defectors wearing masks to cover their faces participate Feb. 21, 2012, in a rally against the Chinese government's arrest of North Korean refugees, near the Chinese Embassy in Seoul. The protesters called for China not to send North Korean refugees back to their country, saying those refugees might be executed. (Associated Press)