On this day of culminating political fervor in the States, New York-based producer Nick AM is nodding to the political history of his own Iranian-American roots in the new video for "Take It Back."Premiering exclusively on Billboard Dance, the video aggregates rare archival footage from pre-revolutionary Iran, with clips taken before the late-'70s revolution showing Iranian men, women and children dancing, waterskiing, going to school, eating, exercising and participating in other rituals of