PCOS DEMO: Senate President Juan Ponce Enrile and Senator Koko Pimentel pay close attention to Cesar Flores, president of Smartmatic Asia Pacific, as he explains the workings of the Precinct Count Optical Scan (PCOS) and Consolidation Canvassing System (CCS) machines during a demonstration at the Senate Thursday, June 28, 2012. (PRIB Photo by Albert Calvelo)