Protesters display placards prior to marching towards the U.S. in Manila, Philippines, Friday April 13, 2012. Protesters staged a rally against the annual joint-military exercise dubbed Balikatan 2012 or 'Shoulder-to-Shoulder' in the West Philippine Sea where the disputed Spratly Islands is located. Thousands of U.S. and Philippine troops will take part in the annual military exercise which begins Monday. (AP Photo/Bullit Marquez)