Karen National Union (KNU) soldiers stand guard with their assault weapons at Oo Kray Kee village in Karen State near Thai-Myanmar border on January 30, 2012. The Karen National Union (KNU) is waging the world's longest-running insurgency, launched 63 years ago, shortly after the nation then known as Burma won its independence from Britain in 1948.   AFP PHOTO/PORNCHAI KITTIWONGSAKUL / AFP PHOTO / PORNCHAI KITTIWONGSAKUL