Protesters retreat after riot police fired tear gas in La Paz, Bolivia, Wednesday April 6, 2011. The protest was called by the Bolivian Workers Central (COB) to demand a higher increase in minimum wage in response to the government's March 2 announcement of a 10% increase. A 10% increase would bring the minimum wage up to 815 Bolivianos ($116) per month. (AP Photo/Juan Karita)