This Conflict Minerals Report for the year ended December 31, 2015 is presented to comply with Rule 13p-1 under the Securities Exchange Act of 1934 relating to “conflict minerals” (the “Rule”). For purposes of the Rule, “conflict minerals” are limited to cassiterite, columbite-tantalite, wolframite and gold, including their derivatives, which are limited to tin, tantalum and tungsten.