Privately contracted miners march in La Paz, Bolivia, Sept. 18, 2012. Violence erupted Tuesday when one faction of privately contracted miners threw a small dynamite charge into a crowd of state miners who were protesting on a main road in the Bolivian capital. The two sides have been staging rival protests for months for control of the Colquiri tin mine, which is 100 miles (160 kilometers) south of La Paz. (AP Photo/Juan Karita)
