At four different listening centers it recorded short-wave broadcasts on plastic disks. Selected material was transcribed and translated and then sent to War agencies with weekly reports. These special reports included special titles such as "Radio Tokyo's Racial Propaganda to the United States, Underground Movements and Morale in Japan," and "New Nazi Portrait of the American Soldier." Monitored stations included official stations in many countries, and "black" stations that weren't what they pretended be. These black stations broadcast attacks on President Franklin D. Roosevelt while pretending to be stations in the American Midwest. This tactic was used to stir up race tensions and other issues.